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#include<stdio.h>
#include<conio.h>
#include<string.h>
#include<stdlib.h>

typedef struct src
{
    char name[30];
    char id[15];

    float marksds;
    float marksec;
    float marksdm;
    float marksde;

    float gpds;
    float gpec;
    float gpdm;
    float gpde;

    char gradeds[3];
    char gradeec[3];
    char gradedm[3];
    char gradede[3];

    char commentds[20];
    char commentec[20];
    char commentdm[20];
    char commentde[20];

    float gp;
    char comment[30];

    struct src *ptr;
} src;

src *head=NULL,*temp,*x;

float final(char c[],float a,float b,float i,float j)
{
    float e=(a+b+i+j)/4;

    if(e==4.00)
    {
        strcpy(c,"Outstanding");
    }
    else if(e<4.00&&e>=3.75)
    {
        strcpy(c,"Excellent");
    }
    else if(e<3.75&&e>=3.50)
    {
        strcpy(c,"Very Good");
    }
    else if(e<3.50&&e>=3.25)
    {
        strcpy(c,"Good");
    }
    else if(e<3.25&&e>=3.00)
    {
        strcpy(c,"Satisfactory");
    }

    else if(e<3.00&&e>=2.75)
    {
        strcpy(c,"Above Average");
    }
    else if(e<2.75&&e>=2.50)
    {
        strcpy(c,"Average");
    }
    else if(e<2.50&&e>=2.25)
    {
        strcpy(c,"Bellow Average");
    }
    else if(e<2.25&&e>=2.00)
    {
        strcpy(c,"Pass");
    }
    else if(e<2.00&&e>=0.00)
    {
        strcpy(c,"Fail");
    }

    return e;
}

float grade(char c[],char d[],float a)
{
    if(a>=80&&a<=100)
    {
        strcpy(c,"A+");
        strcpy(d,"Outstanding");
        return 4;
    }
    else if(a>=75.00&&a<=79.00)
    {
        strcpy(c,"A");
        strcpy(d,"Excellent");
        return 3.75;
    }
    else if(a>=70&&a<=74)
    {
        strcpy(c,"A-");
        strcpy(d,"Very Good");
        return 3.50;
    }
    else if(a>=65&&a<=69)
    {
        strcpy(c,"B+");
        strcpy(d,"Good");
        return 3.25;
    }
    else if(a>=60&&a<=64)
    {
        strcpy(c,"B");
        strcpy(d,"Satisfactory");
        return 3;
    }

    else if(a>=55&&a<=59)
    {
        strcpy(c,"B-");
        strcpy(d,"Avobe Average");
        return 2.75;
    }
    else if(a>=50&&a<=54)
    {
        strcpy(c,"C+");
        strcpy(d,"Average");
        return 2.50;
    }
    else if(a>=45&&a<=49)
    {
        strcpy(c,"C");
        strcpy(d,"Bellow Average");
        return 2.25;
    }
    else if(a>=40&&a<=44)
    {
        strcpy(c,"D");
        strcpy(d,"Pass");
        return 2;
    }
    else if(a>=0&&a<=39)
    {
        strcpy(c,"F");
        strcpy(d,"Fail");
        return 0;
    }
}

void insertion()
{
    while(1)
    {
        x=(src*)malloc(sizeof(src));

        printf("\nEnter The Name: ");
        scanf(" %[^\n]s",&x->name);

        printf("Enter The Id  : ");
        scanf(" %[^\n]s",&x->id);

        printf("\nEnter The Marks:\n");
        printf("----------------\n");

        printf("Marks For Data Structure       : ");
        scanf("%f",&x->marksds);
        x->gpds=grade(x->gradeds,x->commentds,x->marksds);

        printf("Marks For Electrical Circuit   : ");
        scanf("%f",&x->marksec);
        x->gpec=grade(x->gradeec,x->commentec,x->marksec);

        printf("Marks For Discrete Math        : ");
        scanf("%f",&x->marksdm);
        x->gpdm=grade(x->gradedm,x->commentdm,x->marksdm);

        printf("Marks For Differential Equation: ");
        scanf("%f",&x->marksde);
        x->gpde=grade(x->gradede,x->commentde,x->marksde);

        x->gp=final(x->comment,x->gpds,x->gpec,x->gpdm,x->gpde);

        x->ptr=NULL;
        printf("-------------------------------------------------------------------------------");

        if(head==NULL)
        {
            head=x;
        }
        else
        {
            temp=head;
            while(temp->ptr!=NULL)
            {
                temp=temp->ptr;
            }
            temp->ptr=x;
        }

        printf("\n\t\t\tContinue Getting Information(Y/N)");
        printf("\n-------------------------------------------------------------------------------");

        char ch=getch();
        if(ch=='N'||ch=='n')
        {
            break;
        }
    }
    main2();
}

void printall()
{
    int c;
    printf("\n ----------");
    printf("\n ALL RECORD:");
    printf("\n ----------");

    temp=head;

    if(temp==NULL)
    {
        printf("\n\t\t\tRecord Empty.\n");
    }

    while(temp!=NULL)
    {
        printf("\n Student Name: %s\n Student Id  : %s\n\n",temp->name,temp->id);
        printf(" Course Title\t\t  Grade\t  Grade Point\t  Comment\n");
        printf(" ------------\t\t  -----\t  -----------\t  -------\n");

        if(temp->gradeds[1]=='+'||temp->gradeds[1]=='-')
        {
            printf(" Data Structure\t\t   %s      %.2f           %s\n",temp->gradeds,temp->gpds,temp->commentds);
        }
        else
        {
            printf(" Data Structure\t\t   %s       %.2f           %s\n",temp->gradeds,temp->gpds,temp->commentds);
        }
        if(temp->gradeec[1]=='+'||temp->gradeec[1]=='-')
        {
            printf(" Electrical Circuit\t   %s      %.2f           %s\n",temp->gradeec,temp->gpec,temp->commentec);
        }
        else
        {
            printf(" Electrical Circuit\t   %s       %.2f           %s\n",temp->gradeec,temp->gpec,temp->commentec);
        }
        if(temp->gradedm[1]=='+'||temp->gradedm[1]=='-')
        {
            printf(" Discrete Math \t\t   %s      %.2f           %s\n",temp->gradedm,temp->gpdm,temp->commentdm);
        }
        else
        {
            printf(" Discrete Math \t\t   %s       %.2f           %s\n",temp->gradedm,temp->gpdm,temp->commentdm);
        }
        if(temp->gradede[1]=='+'||temp->gradede[1]=='-')
        {
            printf(" Differential Equation\t   %s      %.2f           %s\n\n",temp->gradede,temp->gpde,temp->commentde);
        }
        else
        {
            printf(" Differential Equation\t   %s       %.2f           %s\n\n",temp->gradede,temp->gpde,temp->commentde);
        }
        printf("\n\t\t\t     SGPA= %.2f\t\t  %s\n",temp->gp,temp->comment);

        temp=temp->ptr;
        printf("-------------------------------------------------------------------------------\n");

    }

    printf("\n-------------------------------------------------------------------------------\n");
    printf("\t\t\tMAIN MENU OR TERMINATE(M/T)");
    printf("\n-------------------------------------------------------------------------------\n");
    char ch=getch();
    if(ch=='M'||ch=='m')
    {

        main2();
    }
}

void search()
{
    int b=0;
    char d[30];
    printf("\nEnter The Id: ");
    scanf(" %[^\n]s",&d);
    printf("-------------------------------------------------------------------------------\n");

    temp=head;
    while(temp!=NULL)
    {
        if(strcmp(temp->id,d)==0)

        {
            b=1;
            break;
        }
        else
        {
            temp=temp->ptr;
        }

    }
    if(b==0)
    {
        printf("Record Not Found\n");
    }
    else
    {
        printf("\n Student Name: %s\n Student Id  : %s\n\n",temp->name,temp->id);

        printf(" Course Title\t\t  Grade\t  Grade Point\t  Comment\n");
        printf(" ------------\t\t  -----\t  -----------\t  -------\n");

        if(temp->gradeds[1]=='+'||temp->gradeds[1]=='-')
        {
            printf(" Data Structure\t\t   %s      %.2f           %s\n",temp->gradeds,temp->gpds,temp->commentds);
        }
        else
        {
            printf(" Data Structure\t\t   %s       %.2f           %s\n",temp->gradeds,temp->gpds,temp->commentds);
        }
        if(temp->gradeec[1]=='+'||temp->gradeec[1]=='-')
        {
            printf(" Electrical Circuit\t   %s      %.2f           %s\n",temp->gradeec,temp->gpec,temp->commentec);
        }
        else
        {
            printf(" Electrical Circuit\t   %s       %.2f           %s\n",temp->gradeec,temp->gpec,temp->commentec);
        }
        if(temp->gradedm[1]=='+'||temp->gradedm[1]=='-')
        {
            printf(" Discrete Math \t\t   %s      %.2f           %s\n",temp->gradedm,temp->gpdm,temp->commentdm);
        }
        else
        {
            printf(" Discrete Math \t\t   %s       %.2f           %s\n",temp->gradedm,temp->gpdm,temp->commentdm);
        }
        if(temp->gradede[1]=='+'||temp->gradede[1]=='-')
        {
            printf(" Differential Equation\t   %s      %.2f           %s\n\n",temp->gradede,temp->gpde,temp->commentde);
        }
        else
        {
            printf(" Differential Equation\t   %s       %.2f           %s\n\n",temp->gradede,temp->gpde,temp->commentde);
        }


        printf("\n\t\t\t     SGPA= %.2f\t\t  %s\n",temp->gp,temp->comment);
        printf("-------------------------------------------------------------------------------\n");
    }
    printf("-------------------------------------------------------------------------------\n");
    printf("\t\t\tMAIN MENU OR CONTINUE(M/C)");
    char ch=getch();
    if(ch=='C'||ch=='c')
    {
        printf("\n-------------------------------------------------------------------------------\n");
        search();
    }
    else
    {
        main2();
    }

}
int help(char d[])
{
    int b=0;
    temp=head;
    while(temp!=NULL)
    {
        if(strcmp(temp->id,d)==0)

        {
            b=1;
            break;
        }
        else
        {
            temp=temp->ptr;
        }
    }

    return b;

}

void delete()
{
    char d[30];
    int b=0,c;
    src *temp1;
    printf("\nEnter The Id: ");
    scanf(" %[^\n]s",&d);
    printf("----------------\n");
    c=help(d);
    if(c==0)
    {
        printf(" Unsuccesful\n");
        goto bue;
    }

    temp=head;
    if(strcmp(head->id,d)==0)
    {
        head=head->ptr;
        free(temp);
        b=1;
    }

    temp=head;
    while(temp!=NULL)
    {
        if(strcmp(temp->id,d)==0)
        {
            b=1;
            temp1->ptr=temp->ptr;
            free(temp);
            break;
        }
        else
        {
            temp1=temp;
            temp=temp->ptr;
        }

    }
    if(b==0)
    {
        printf(" Unsuccesful\n");
    }
    else
    {
        printf(" Succesful\n");
    }

bue:

    printf("-------------------------------------------------------------------------------\n");
    printf("\t\t\tMAIN MENU OR CONTINUE(M/C)");
    char ch=getch();
    if(ch=='c'||ch=='C')
    {
        printf("\n-------------------------------------------------------------------------------\n");
        delete();
    }
    else
    {
        main2();
    }
}

void  main2()
{

    int a;
    printf("\n-------------------------------------------------------------------------------");
    printf("\n\t  1. For Adding Student Information.\n");
    printf("\t  2. For Deleting Student Information.\n");
    printf("\t  3. For Displaying All Student Information.\n");
    printf("\t  4. For Displaying Specific Student Information.\n");
    printf("\t  5. For Closing The Program");
    printf("\n-------------------------------------------------------------------------------");
    printf("\nChoose The Operation: ");
    scanf(" %d",&a);
    printf("-------------------------------------------------------------------------------");

    if(a==1)
    {
        insertion();
    }
    else if(a==2)
    {
        delete();
    }
    else if(a==3)
    {
        printall();
    }
    else if(a==4)
    {
        search();
    }
    else if(a==5)
    {
        return 0;
    }
}

int main()
{
    system("COLOR 0B");

    printf("\t\t\t---------------------\n");
    printf("\t\t\t STUDENT REPORT CARD\n");
    printf("\t\t\t---------------------\n");

    main2();

    return 0;
}