#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main(int argc, char **argv)
{
    double answer;
    printf("|*************************** Welcome to the exercise_4 ! ***************************|\n");
    printf("|                                                                                   |\n");
    printf("|                                                                                   |\n");
    printf("|In this program we will be able to evaluate all the students we want !             |\n");
    printf("|                                                                                   |\n");
    printf("|                                                                                   |\n");
    printf("|Would you like to enter in the program ? Press [1/0] ( 1 -> Enter || 0 -> Quit)    |\n");
    printf("|                                                                                   |\n");
    printf("|                                                                                   |\n");
    printf("|***********************************************************************************|\n");
    printf("\n\nChoice : ");
    scanf("%lf", &answer);
    system("cls");
    while((int)answer<0 || (int)answer>1){
                printf("Error, please enter a correct value : ");
                scanf("%lf",&answer);
                system("cls");
            }
    while(answer==1){
        double menuloop = 1;
        int *answerArray=NULL;
        int *studentArray=NULL;
        int *statsArray=NULL;
        int rangeStats;
        int dataRange;
        int initStats = 0;
        int mark;
        int maxIndex;
        int max = 0;
        int min = 0;
        int maxStudent= 0;
        int minStudent= 0;
        int class;
        double average = 0;
        double nbAnswer;
        int init = 0;
        int initAnswer = 0;
        double valueAnswer;
        double nbStudent;
        int valueStudent;
        double studentTag;
        double studentAnswer;
        double underMenu2;
        double underMenu3;
        double answerUnderMenu2;
        double questionChange;
        double answerChange;
        double modifySelect;
        double changeValue;
        double modifyService;
        double underMenu4;
        int existStudent = 0;
        int verifStudent = 0;
        int studentNumber;
        srand(time(NULL));
        while(menuloop==1){
            double menuanswer;
            int i;
            int j=0;
            int a = 1;
            printf("\n\n|**************************************** Menu ****************************************|\n");
            printf("|                                                                                      |\n");
            printf("|                                                                                      |\n");
            printf("|Select the option you want :                                                          |\n");
            printf("|                                                                                      |\n");
            printf("|1 Select the correction of the questions, and display it                              |\n");
            printf("|2 Enter the number of students you want, their answers and their service number       |\n");
            printf("|3 Modify the array                                                                    |\n");
            printf("|4 Display result of a student                                                         |\n");
            printf("|5 Display statistics                                                                  |\n");
            printf("|6 Menu of the array generation                                                        |\n");
            printf("|7 Reset the array                                                                     |\n");
            printf("|8 Exit the menu                                                                       |\n");
            printf("|                                                                                      |\n");
            printf("|**************************************************************************************|\n");
            printf("\n\nChoice :");
            scanf("%lf",&menuanswer);
            system("cls");
            while((int)menuanswer<=0 ||(int)menuanswer>8){
                printf("Error, please enter a correct value : ");
                scanf("%lf",&menuanswer);
                system("cls");
            }
            switch((int)menuanswer){
                case 1:{
                    double underMenuAnswer;
                    double menuloop2=1;
                    while(menuloop2 == 1){
                    printf("\n\nWhat do you want to do ?\n");
                    printf("1\\Enter the correction\n\n");
                    printf("2\\Display the correction\n\n");
                    printf("3\\Exit\n\n");
                    printf("\n\nChoice :");
                    scanf("%lf",&underMenuAnswer);
                    system("cls");
                    while((int)underMenuAnswer<=0 ||(int)underMenuAnswer>3){
                        printf("Error, please enter a correct value : ");
                        scanf("%lf",&underMenuAnswer);
                        system("cls");
                    }
                    switch((int)underMenuAnswer){
                        case 1:{                    // CORRECTION MENU
                                if(initAnswer == 1){
                                printf("\n\nPlease, reset or modify the array before trying to select an other correction ! ");
                                break;
                                }
                                printf("\n\nHow many questions are there ? (Select a value between 10 and 100)\n");
                                printf("Choice : ");
                                scanf("%lf",&nbAnswer);
                                system("cls");
                                while((int)nbAnswer<10 || (int)nbAnswer>100){
                                    printf("\n\nThere is no interest in doing an evaluation of 0 or more than 100 questions. Please enter a value between 10 and 100\n");
                                    printf("Value : ");
                                    scanf("%lf",&nbAnswer);
                                    system("cls");
                                }
                                answerArray=malloc(sizeof(int)*nbAnswer);
                                for(i=0;i<(int)nbAnswer;i++){               // ENTRY OF THE CORRECTION
                                    printf("Question number %d : ",i+1);
                                    scanf("%lf",&valueAnswer);
                                    system("cls");
                                    while((int)valueAnswer<=0 ||(int)valueAnswer>5){
                                        printf("\n\nYou can not enter a negative number, a 0 or a higher number than 5 as a correction. An answer is between 1 and 5 !");
                                        printf("Value : ");
                                        scanf("%lf",&valueAnswer);
                                        system("cls");
                                    }
                                    answerArray[i]=(int)valueAnswer;
                                }
                                initAnswer = 1;
                                break;
                        }
                        case 2:{
                            if(initAnswer == 0){
                                printf("Enter a correction before trying to display it !");
                                break;
                            }
                            printf("The good answers are : \n");
                            for(i=0;i<(int)nbAnswer;i++){
                                printf("Question %d : %d | ",i+1,answerArray[i]);
                                if(i%6==5){
                                    printf("\n");
                                }
                            }

                        }
                        case 3:{
                            menuloop2=0;
                            break;
                        }

                    }
                }

                    break;
                }
                case 2:{                        // MANANGING STUDENT
                    if(initAnswer == 0){
                        printf("Error, please enter a correction before trying to manage the students results");
                        break;
                    }
                    printf("\n\nEnter the number of students you want : ");
                    scanf("%lf",&nbStudent);
                    system("cls");
                    while((int)nbStudent<0 || (int)nbStudent == 0 ){
                        printf("\n\nYou can not enter a 0 or a negative number as a number of student. Please enter a correct value : ");
                        scanf("%lf",&nbStudent);
                        system("cls");
                    }
                    valueStudent = ((int)nbAnswer+1)*(int)nbStudent;
                    studentArray = malloc(sizeof(int)*valueStudent);
                    for(i=0;i<valueStudent;i++){                    // ENTRY OF A STUDENT
                            if(i%((int)nbAnswer+1) == 0){
                                j++;
                                printf("Please, enter the service number of the student %d : ",j);
                                scanf("%lf",&studentTag);
                                system("cls");
                                while(studentTag/10000 < 1 || studentTag/100000 >=1 || (int)studentTag<=0){
                                    printf("Error, the service number of a student has to be entered with 5 numbers ! ");
                                    printf("Student number : ");
                                    scanf("%lf",&studentTag);
                                    system("cls");
                                }
                                studentArray[i] = (int)studentTag;
                            }
                            if(i%((int)nbAnswer+1) != 0){
                                printf("Response %d of the student number %g : ",a,studentTag);
                                scanf("%lf",&studentAnswer);
                                system("cls");
                                while((int)studentAnswer<1 || (int)studentAnswer>5){
                                    printf("Error, please enter a correct value. Answer needs to be between 1 and 5 : ");
                                    scanf("%lf",&studentAnswer);
                                    system("cls");
                                }
                                studentArray[i] = (int)studentAnswer;
                                a++;
                                if(a%((int)nbAnswer+1) == 0){
                                    a=1;
                                }
                            }
                    }
                    init = 1;
                    break;
                }
                case 3:{
                    if(initAnswer == 0){
                        printf("Before trying to modify the array, please enter the correction in the array !");
                        break;
                    }
                    if (init == 0){
                        printf("Before trying to modify the array, please enter the students in the array !");
                        break;
                    }
                    int menuloop3 = 1;
                    while(menuloop3 == 1){                      // MODIFY ARRAY
                        printf("|********************MENU**********************|\n");
                        printf("|What do you want to modify in the array ?     |\n");
                        printf("|                                              |\n");
                        printf("|1 Modify the correction                       |\n");
                        printf("|2 Modify the service number of a student      |\n");
                        printf("|3 Modify the answers of a student             |\n");
                        printf("|4 Exit                                        |\n");
                        printf("|                                              |\n");
                        printf("|----------------------------------------------|\n");
                        scanf("%lf",&underMenu2);
                        system("cls");
                        while((int)underMenu2<=0 || (int)underMenu2>4){
                            printf("Error, please enter a correct value : ");
                            scanf("%lf",&underMenu2);
                            system("cls");
                        }
                        switch((int)underMenu2){
                            case 1:{                            // MODIFY SELECTION OF THE CORRECTION
                                printf("\n\nWould you like to modify a specific question or all ? (0 -> specific question /\\ 1 -> All the questions )\n");
                                printf("Choice : ");
                                scanf("%lf",&answerUnderMenu2);
                                system("cls");
                                while((int)answerUnderMenu2<0 ||(int)answerUnderMenu2>1){
                                    printf("Error, enter a correct value : ");
                                    scanf("%lf",&answerUnderMenu2);
                                    system("cls");
                                }
                                if(answerUnderMenu2 == 1){              // ANSWER SELECTED FOR CORRECTION
                                    for(i=0;i<(int)nbAnswer;i++){
                                        printf("Question number %d : ",i+1);
                                        scanf("%lf",&valueAnswer);
                                        system("cls");
                                        while((int)valueAnswer<=0 ||(int)valueAnswer>5){
                                            printf("\n\nYou can not enter a negative number, a 0 or a higher number than 5 as a correction. An answer is between 1 and 5 !");
                                            printf("Value : ");
                                            scanf("%lf",&valueAnswer);
                                            system("cls");
                                        }
                                        answerArray[i]=(int)valueAnswer;
                                    }
                                }else{
                                    printf("The good answers are : \n");            // DISPLAY THEM
                                    for(i=0;i<(int)nbAnswer;i++){
                                        printf("Question %d : %d | ",i+1,answerArray[i]);
                                        if(i%6==5){
                                            printf("\n");
                                        }
                                    }
                                    printf("\n\nWhich question would you like to change ?");
                                    scanf("%lf",&questionChange);
                                    while((int)questionChange<=0 ||(int)questionChange>(int)nbAnswer){
                                        printf("\n\nThis question does not exist ! The questions are from 1 to %g ! Please enter a correct value : ",nbAnswer);
                                        scanf("%lf",&questionChange);
                                        system("cls");
                                    }
                                    printf("\n\nThe response of the question number %g is : %d ",questionChange,answerArray[(int)questionChange-1]);
                                    printf("\n\nEnter the new value : ");
                                    scanf("%lf",&answerChange);
                                    system("cls");
                                    while((int)answerChange<=0 ||(int)answerChange>5){
                                        printf("\n\nError, enter a correct value, between 1 and 5 : ");
                                        scanf("%lf",&answerChange);
                                        system("cls");
                                    }
                                    answerArray[(int)questionChange-1]=(int)answerChange;
                                }
                                break;
                            }
                            case 2:{                        // SELECTION OF THE STUDENT YOU WANT
                                verifStudent=0;
                                printf("\n\nList of students : \n");
                                for(i=0;i<valueStudent;i++){
                                    if(i%((int)nbAnswer+1)== 0){
                                        printf(" Student %d ||",studentArray[i]);
                                    }
                                }
                                printf("Enter the student you want to modify : ");
                                scanf("%lf",&modifySelect);
                                while(modifySelect/10000 < 1 || modifySelect/100000 >=1 || (int)modifySelect<=0){
                                    printf("Error, the service number of a student has to be entered with 5 numbers ! ");
                                    printf("Student number : ");
                                    scanf("%lf",&modifySelect);
                                    system("cls");
                                }
                                while(verifStudent == 0){
                                    for(i=0;i<valueStudent;i++){
                                        if(studentArray[i] == (int)modifySelect){
                                            verifStudent=1;
                                        }
                                    }
                                    if(verifStudent==0){
                                        printf("Error, this student does not exist. Please enter a correct number : ");
                                        scanf("%lf",&modifySelect);
                                        system("cls");
                                    }
                                }
                                printf("\n\nNow modify his service number : ");             // MODIFY A STUDENT
                                scanf("%lf",&modifyService);
                                while(modifyService/10000 < 1 || modifyService/100000 >=1 || (int)modifyService<=0){
                                    printf("Error, the service number of a student has to be entered with 5 numbers ! ");
                                    printf("Student number : ");
                                    scanf("%lf",&modifyService);
                                    system("cls");
                                }
                                while(existStudent == 0){
                                    for(i=0;i<valueStudent;i++){
                                        if(studentArray[i] == (int)modifyService){
                                            existStudent++;
                                        }
                                    }
                                    if(existStudent==0){
                                        break;
                                    }
                                    if(existStudent>0){
                                        printf("Error, this student already exists. Please enter a unique number : ");
                                        scanf("%lf",&modifyService);
                                        system("cls");
                                        existStudent=0;
                                    }

                                }
                                printf("His service number is now : %g ",modifyService);
                            break;
                            }
                            case 3:{                    // DISPLAY AND MODIFY ANSWERS OF A STUDENT
                                verifStudent=0;
                                printf("\n\nList of students : \n");
                                for(i=0;i<valueStudent;i++){
                                    if(i%((int)nbAnswer+1)== 0){
                                        printf(" Student %d ||",studentArray[i]);
                                    }
                                }
                                printf("Enter the student you want to modify : ");
                                scanf("%lf",&modifySelect);
                                while(modifySelect/10000 < 1 || modifySelect/100000 >=1 || (int)modifySelect<=0){
                                    printf("Error, the service number of a student has to be entered with 5 numbers ! ");
                                    printf("Student number : ");
                                    scanf("%lf",&modifySelect);
                                    system("cls");
                                }
                                while(verifStudent == 0){
                                    for(i=0;i<valueStudent;i++){
                                        if(studentArray[i] == (int)modifySelect){
                                            verifStudent=1;
                                        }
                                    }
                                    if(verifStudent==0){
                                        printf("Error, this student does not exist. Please enter a correct number : ");
                                        scanf("%lf",&modifySelect);
                                        system("cls");
                                    }

                                }
                                printf("Here is the answers of the student :");
                                for(i=0;i<valueStudent;i++){
                                    if(studentArray[i] == (int)modifySelect){
                                        for(j=0;j<nbAnswer;j++){
                                            printf(" Question %d : %d ||",j+1,studentArray[i+j+1]);
                                        }
                                    }
                                }
                                printf("Modify his answers : ");
                                for(i=0;i<valueStudent;i++){
                                    if(studentArray[i] == (int)modifySelect){
                                        for(j=0;j<nbAnswer;j++){
                                            printf(" Question %d : \n",j+1);
                                            scanf("%lf",&changeValue);
                                            system("cls");
                                            while((int)changeValue<1 || (int)changeValue>5){
                                                printf("Error, answer needs to be between 1 and 5. Correct value : ");
                                                scanf("%lf",&changeValue);
                                                system("cls");
                                            }
                                            studentArray[i+j+1]=(int)changeValue;
                                        }
                                    }
                                }
                            }
                            case 4:{
                                menuloop3 = 0;
                                break;
                            }
                        }
                    }
                    break;
                }
                case 4:{                    // SELECTION OF THE STUDENTS AND GET HIS ANSWERS
                    if(initAnswer == 0){
                        printf("Before trying to display a student, please enter the correction in the array !");
                        break;
                    }
                    if (init == 0){
                        printf("Before trying to display a student, please enter the students in the array !");
                        break;
                    }
                    verifStudent=0;
                    printf("\n\nList of students : \n");
                    for(i=0;i<valueStudent;i++){
                        if(i%((int)nbAnswer+1)== 0){
                            printf(" Student %d ||",studentArray[i]);
                        }
                    }
                    printf("Enter the student you want to modify : ");
                    scanf("%lf",&modifySelect);
                    while(modifySelect/10000 < 1 || modifySelect/100000 >=1 || (int)modifySelect<=0){
                        printf("Error, the service number of a student has to be entered with 5 numbers ! ");
                        printf("Student number : ");
                        scanf("%lf",&modifySelect);
                        system("cls");
                    }
                    while(verifStudent == 0){
                        for(i=0;i<valueStudent;i++){
                            if(studentArray[i] == (int)modifySelect){
                                verifStudent=1;
                            }
                        }
                        if(verifStudent==0){
                            printf("Error, this student does not exist. Please enter a correct number : ");
                            scanf("%lf",&modifySelect);
                            system("cls");
                        }
                    }
                    printf("Here is the answers of the student :");
                    for(i=0;i<valueStudent;i++){
                        if(studentArray[i] == (int)modifySelect){
                            for(j=0;j<nbAnswer;j++){
                                printf(" Question %d : %d ||",j+1,studentArray[i+j+1]);
                            }
                        }
                    }
                    break;
                }
                case 5:{                // MENU STATS
                    if(initAnswer == 0){
                        printf("Before trying to display statistics, please enter the correction in the array !");
                        break;
                    }
                    if (init == 0){
                        printf("Before trying to display statistics, please enter the students in the array !");
                        break;
                    }
                    int menuloop4 = 1;
                    rangeStats=1+(int)nbAnswer+((int)nbStudent*2);
                    statsArray = malloc(sizeof(int)*rangeStats);
                    a=0;
                    while(menuloop4 == 1){
                        dataRange=(int)nbAnswer+1;
                        printf("\n\n|***************************Stats***************************|\n");
                        printf("|Here you can have some statistics :                        |\n");
                        printf("|                                                           |\n");
                        printf("|1 Display the average of the evaluation                    |\n");
                        printf("|2 Display the mark of each student                         |\n");
                        printf("|3 Display the class of each student                        |\n");
                        printf("|4 Display the best student                                 |\n");
                        printf("|5 Display the most successful question                     |\n");
                        printf("|6 Display the less successful question                     |\n");
                        printf("|7 Display the number of good answers for each question     |\n");
                        printf("|8 Exit                                                     |\n");
                        printf("|                                                           |\n");
                        printf("|                                                           |\n");
                        printf("|***********************************************************|\n");
                        printf("\n\nGo to : ");
                        scanf("%lf",&underMenu4);
                        system("cls");
                        while((int)underMenu4<=0 || (int)underMenu4>9){
                            printf("Error, please enter a correct value : ");
                            scanf("%lf",&underMenu4);
                            system("cls");
                        }
                        switch((int)underMenu4){
                            case 1:{                // INITIALISATION OF THE AVERAGE AND ALL OTHER STATS
                                mark = 0;
                                if(initStats==1){
                                    printf("\n\nThe average is %.2lf \n\n",average);
                                    break;
                                }
                                for(i=0;i<=valueStudent;i++){
                                    if(i%((int)nbAnswer+1)==0){
                                            if(j==(int)nbAnswer){
                                                statsArray[dataRange]=mark;
                                                dataRange++;
                                            }
                                        average=average+mark;
                                        mark = 0;
                                        j=0;
                                        statsArray[dataRange]=studentArray[i];
                                        dataRange++;
                                    }
                                    if(i%((int)nbAnswer+1)!=0){
                                        if(studentArray[i]==answerArray[j]){
                                            mark++;
                                        }
                                        j++;
                                    }


                                }
                                average=average/(int)nbStudent;
                                printf("\n\nThe average is : %.2lf \n\n",average);
                                initStats = 1;
                                break;
                            }
                            case 2:{                // SPECIFIC STUDENT STATS
                                if(initStats==0){
                                    printf("\n\nPlease initialize the statistics with the average first !\n\n");
                                    break;
                                }
                                mark = 0;
                                for(i=0;i<=valueStudent;i++){
                                    if(i%((int)nbAnswer+1)==0){
                                            if(j==(int)nbAnswer){
                                                printf("\n\nThe student %d got a mark of : %d\n\n",statsArray[dataRange-1],statsArray[dataRange]);
                                                dataRange++;
                                            }
                                        j=0;
                                        dataRange++;
                                    }
                                    if(i%((int)nbAnswer+1)!=0){
                                        if(studentArray[i]==answerArray[j]){
                                            mark++;
                                        }
                                        j++;
                                    }
                                }
                                break;
                            }
                            case 3:{                    // EACH STUDENT STATS
                                if(initStats==0){
                                    printf("\n\nPlease calculate the average before trying to get classes. It doesn't mean anything to get the class without the average anyway ...\n\n");
                                    break;
                                }
                                for(i=dataRange;i<rangeStats;i=i+2){
                                    class=statsArray[i+1]-(int)average;
                                    if(class>0){
                                        printf("\n\nThe student %d is at %c %d from the average\n\n",statsArray[i],43,class);
                                    }
                                    if(class<0){
                                        printf("\n\nThe student %d is at %c %d from the average\n\n",statsArray[i],45,class);
                                    }
                                    if(class == 0){
                                        printf("\n\nThe student %d is on the average\n\n",statsArray[i]);
                                    }
                                }
                                break;
                            }
                            case 4:{                    // WORST AND BEST STUDENT
                                if(initStats==0){
                                    printf("\n\nPlease initialize the statistics with the average first !\n\n");
                                    break;
                                }
                                min=statsArray[dataRange+1];
                                minStudent=statsArray[dataRange];
                                for(i=dataRange;i<rangeStats-1;i=i+2){
                                    if(statsArray[i+1]>max){
                                        max=statsArray[i];
                                        maxStudent=statsArray[i+1];
                                    }
                                    if(statsArray[i+1]<min){
                                        min=statsArray[i];
                                        minStudent=statsArray[i+1];
                                    }
                                }
                                printf("\n\nThe best student is the number %d with a mark of %d !\n",max,maxStudent);
                                printf("The worst student is the number %d with a mark of %d !\n\n",min,minStudent);
                                break;
                            }
                            case 5:{
                                if(initStats==0){                       // STATS MAX
                                    printf("\n\nPlease initialize the statistics with the average first !\n\n");
                                    break;
                                }
                                for(i=1;i<=(int)nbAnswer;i++){
                                    statsArray[i] = 0;
                                }
                                for(i=0;i<=valueStudent;i++){
                                    if(i%((int)nbAnswer+1)==0){
                                        j=0;
                                    }
                                    if(i%((int)nbAnswer+1)!=0){
                                        if(studentArray[i]==answerArray[j]){
                                            statsArray[j+1]++;
                                        }
                                        j++;
                                    }
                                }
                                for(i=1;i<=(int)nbAnswer;i++){
                                    if((int)max<(int)statsArray[i]){
                                        max=statsArray[i];
                                        maxIndex=i;
                                    }
                                }
                                printf("\n\nThe most successful question is the number %d\n\n",maxIndex);
                                break;
                            }
                            case 6:{                        // STATS MIN
                                if(initStats==0){
                                    printf("\n\nPlease initialize the statistics with the average first !\n\n");
                                    break;
                                }
                                min = statsArray[1];
                                for(i=1;i<=(int)nbAnswer;i++){
                                    statsArray[i] = 0;
                                }
                                for(i=0;i<=valueStudent;i++){
                                    if(i%((int)nbAnswer+1)==0){
                                        j=0;
                                    }
                                    if(i%((int)nbAnswer+1)!=0){
                                        if(studentArray[i]==answerArray[j]){
                                            statsArray[j+1]++;
                                        }
                                        j++;
                                    }
                                }
                                for(i=1;i<=(int)nbAnswer;i++){
                                    if((int)min>(int)statsArray[i]){
                                        min=i;
                                    }
                                }
                                printf("\n\nThe less successful question is the number %d\n\n",min);
                                break;
                            }
                            case 7:{                // STATS NUMBER OF GOOD ANSWERS
                                if(initStats==0){
                                    printf("\n\nPlease initialize the statistics with the average first !\n\n");
                                    break;
                                }
                                for(i=1;i<=(int)nbAnswer;i++){
                                    printf("\n\nThe question %d as %d good answers !\n\n",i,statsArray[i]);
                                }
                                break;
                            }
                            case 8:{
                                menuloop4=0;
                                break;
                            }

                        }
                    }
                    break;
                }
                case 6:{                           // INITIATION OF THE ARRAY
                    if(init == 1 || initAnswer == 1){
                        printf("Please, reset the array before trying to generate an other one !");
                        break;
                    }
                    printf("|*********************Array********************|\n");
                    printf("|                                              |\n");
                    printf("|Would you like to load a random array ? [1]   |\n");
                    printf("|Or load a pre-completed array ? [0]           |\n");
                    printf("|                                              |\n");
                    printf("|**********************************************|\n");
                    printf("\n\nChoice : ");
                    scanf("%lf",&underMenu3);
                    system("cls");
                    while((int)underMenu3<0 || (int)underMenu3>2){
                            printf("Error, please enter a correct value : ");
                            scanf("%lf",&underMenu3);
                            system("cls");
                        }
                    switch((int)underMenu3){
                        case 1:{                        // RANDOM EVERYTHING !
                            nbAnswer = rand()%91+10;
                            answerArray = malloc(sizeof(int)*(int)nbAnswer);
                            nbStudent = rand()%501+1;
                            valueStudent = ((int)nbAnswer+1)*(int)nbStudent;
                            studentArray = malloc(sizeof(int)*valueStudent);
                            for(i=0;i<valueStudent;i++){
                                if(i%((int)nbAnswer+1)==0){
                                    studentNumber=rand();
                                    while(studentNumber/10000<1){
                                        studentNumber=rand();
                                    }
                                    studentArray[i]=studentNumber;
                                }
                                if(i%((int)nbAnswer+1)!=0){
                                    studentArray[i]=rand()%5+1;
                                }
                            }
                            init = 1;
                            initAnswer = 1;
                            break;
                        }
                        case 0:{                        // PRE-LOADED ARRAY
                            nbAnswer=10;
                            answerArray = malloc(sizeof(int)*(int)nbAnswer);
                            nbStudent = 10;
                            valueStudent = ((int)nbAnswer+1)*(int)nbStudent;
                            studentArray = malloc(sizeof(int)*valueStudent);
                            answerArray[0]=1;
                            answerArray[1]=2;
                            answerArray[2]=3;
                            answerArray[3]=4;
                            answerArray[4]=5;
                            answerArray[5]=4;
                            answerArray[6]=3;
                            answerArray[7]=2;
                            answerArray[8]=1;
                            answerArray[9]=5;
                            studentArray[0]=12345;
                            studentArray[1]=1;
                            studentArray[2]=2;
                            studentArray[3]=3;
                            studentArray[4]=4;
                            studentArray[5]=5;
                            studentArray[6]=5;
                            studentArray[7]=4;
                            studentArray[8]=2;
                            studentArray[9]=3;
                            studentArray[10]=1;
                            studentArray[11]=12340;
                            studentArray[12]=1;
                            studentArray[13]=4;
                            studentArray[14]=5;
                            studentArray[15]=2;
                            studentArray[16]=5;
                            studentArray[17]=4;
                            studentArray[18]=4;
                            studentArray[19]=2;
                            studentArray[20]=1;
                            studentArray[21]=1;
                            studentArray[22]=54121;
                            studentArray[23]=1;
                            studentArray[24]=2;
                            studentArray[25]=3;
                            studentArray[26]=4;
                            studentArray[27]=5;
                            studentArray[28]=5;
                            studentArray[29]=4;
                            studentArray[30]=2;
                            studentArray[31]=3;
                            studentArray[32]=1;
                            studentArray[33]=13245;
                            studentArray[34]=5;
                            studentArray[35]=2;
                            studentArray[36]=2;
                            studentArray[37]=4;
                            studentArray[38]=1;
                            studentArray[39]=5;
                            studentArray[40]=4;
                            studentArray[41]=1;
                            studentArray[42]=3;
                            studentArray[43]=1;
                            studentArray[44]=14225;
                            studentArray[45]=2;
                            studentArray[46]=2;
                            studentArray[47]=2;
                            studentArray[48]=4;
                            studentArray[49]=1;
                            studentArray[50]=5;
                            studentArray[51]=4;
                            studentArray[52]=1;
                            studentArray[53]=2;
                            studentArray[54]=1;
                            studentArray[55]=23545;
                            studentArray[56]=4;
                            studentArray[57]=2;
                            studentArray[58]=2;
                            studentArray[59]=1;
                            studentArray[60]=1;
                            studentArray[61]=5;
                            studentArray[62]=2;
                            studentArray[63]=1;
                            studentArray[64]=4;
                            studentArray[65]=1;
                            studentArray[66]=14545;
                            studentArray[67]=4;
                            studentArray[68]=4;
                            studentArray[69]=5;
                            studentArray[70]=1;
                            studentArray[71]=1;
                            studentArray[72]=5;
                            studentArray[73]=2;
                            studentArray[74]=2;
                            studentArray[75]=5;
                            studentArray[76]=1;
                            studentArray[77]=11111;
                            studentArray[78]=2;
                            studentArray[79]=2;
                            studentArray[80]=2;
                            studentArray[81]=2;
                            studentArray[82]=1;
                            studentArray[83]=5;
                            studentArray[84]=3;
                            studentArray[85]=1;
                            studentArray[86]=4;
                            studentArray[87]=4;
                            studentArray[88]=22522;
                            studentArray[89]=2;
                            studentArray[90]=3;
                            studentArray[91]=5;
                            studentArray[92]=2;
                            studentArray[93]=1;
                            studentArray[94]=1;
                            studentArray[95]=3;
                            studentArray[96]=1;
                            studentArray[97]=4;
                            studentArray[98]=4;
                            studentArray[99]=23345;
                            studentArray[100]=1;
                            studentArray[101]=1;
                            studentArray[102]=1;
                            studentArray[103]=2;
                            studentArray[104]=1;
                            studentArray[105]=5;
                            studentArray[106]=4;
                            studentArray[107]=1;
                            studentArray[108]=4;
                            studentArray[109]=4;
                            init = 1;
                            initAnswer = 1;
                            break;
                        }
                    }
                    break;
                }
                case 7:{                            // RESET THE ARRAY
                    if(initAnswer == 0 && init == 0){
                        printf("\n\nThere is nothing to reset. Please, try to focus !\n\n");
                        break;
                    }
                    if(initAnswer == 1 && init == 0){
                        free(answerArray);
                        free(statsArray);
                        initAnswer=0;
                        printf("\n\nThe answers have been reseted !\n\n");
                        break;
                    }
                    if(initAnswer == 0 && init == 1){
                        free(studentArray);
                        free(statsArray);
                        init = 0;
                        printf("\n\nthe students have been reseted !\n\n");
                        break;
                    }
                    if(initAnswer == 1 && init == 1){
                        free(answerArray);
                        free(studentArray);
                        free(statsArray);
                        printf("\n\nThe array has been reseted !\n\n");
                        init = 0;
                        initAnswer = 0;
                        break;
                    }
                }
                case 8:{                // QUITE MENU
                    menuloop=0;
                    break;
                }
            }
        }

    printf("\n\n\n********* Would you like to restart the program ? Press [1/0] *********\n\n");
    printf("/!\\ Any error will close the program /!\\ \n\n");
    printf("Choice : ");
    scanf("%lf",&answer);
    system("cls");
    free(statsArray);
    free(answerArray);
    free(studentArray);
    }
    return 0;
}