code updated

//The username and the pass for the admin are admin 12321
#include <stdio.h>
void payment(int SInfo[100][6])
{
    //it's gonna print the payment info for a student chosen by the administrator
}
void add(int SInfo[100][6], int TInfo[100][7], int CInfo[3][3], int TAssessment[100][6], int SAssessment[100][8])
{
	int choice; int counter = 0; char addagain = 'a'; char redo = 'a';
	do
	{
		printf("\nWhat would you like to add?\n1- A student and his/her information.\n2- A teacher and his/her information.\n3- A class' information.\n4- A teacher's assessment.\n5- A student's assessment.\n");
	    scanf("%d", &choice);
	    switch (choice)
	    {
		    case(1):
		    {
			    while(1)
			    {
			        printf("\nPlease enter the student's ID:\n"); //could be name later if I felt like it
			        scanf("%d", SInfo[counter][0]);
			        printf("\nPlease enter the student's age:\n");
			        scanf("%d", SInfo[counter][1]);
			        printf("\nPlease enter the student's gender: (1 for Male/ 0 for Female)\n");
			        scanf("%d", SInfo[counter][2]);
			        printf("\nPlease enter the student's address:\n"); //it's gonna be a string later on just adding headlines
			        scanf("%d", SInfo[counter][3]);
			        printf("\nPlease enter the student's telephone number:\n");
			        scanf("%d", SInfo[counter][4]);
			        printf("please enter this student's fees' payment:\n");
			        scanf("%d", SInfo[counter][5]);
			        printf("\n\nWould you like to add another student's information? (Y/N)\n");
			        scanf("\n%c", &addagain);
			        if(addagain == 'Y' || addagain == 'y')
			        {
				        counter++;
				    	continue;
			        }
				    else if(addagain == 'N' || addagain == 'n')
				    {
				    	if(counter >= 10)
				    	{
					    	counter = 0;
						    break;
					    }
					    else
					    {
						    printf("Insufficient number of students were added, please add more.\n");
						    continue;
					    }
				    }
			    }
			    break;
		    }
		    case(2):
		    {
			    while(1)
			    {
			        printf("\nPlease enter the teacher's ID:\n"); //could be name later if I felt like it
			        scanf("%d", TInfo[counter][0]);
			        printf("\nPlease enter the teacher's age:\n");
			        scanf("%d", TInfo[counter][1]);
			        printf("\nPlease enter the teacher's gender: (1 for Male/ 0 for Female)\n");
			        scanf("%d", TInfo[counter][2]);
			        printf("\nPlease enter the teacher's Educational Level:\n"); //it's gonna be a string later on just adding headlines
			        scanf("%d", TInfo[counter][3]);
			        printf("\nPlease enter the teacher's telephone number:\n");
			        scanf("%d", TInfo[counter][4]);
			        printf("\nPlease enter the teacher's Specialist address:\n");
			        scanf("%d", TInfo[counter][5]);
				    printf("Please enter the teacher's university:\n");
				    scanf("%d", TInfo[counter][6]);
			        printf("\n\nWould you like to add another teacher's information? (Y/N)\n");
			        scanf("\n%c", &addagain);
			        if(addagain == 'Y' || addagain == 'y')
			        {
				        counter++;
					    continue;
			        }
				    else if(addagain == 'N' || addagain == 'n')
				    	break;
			    }
			    break;
		    }
		    case(3):
		    {
			    break;
		    }
		    case(4):
		    {
		    	break;
		    }
		    case(5):
		    {
		    	break;
		    }
		    default:
		    {

		    }
		    printf("\nWould you like to do anything else? (Y/N)\n");
		    scanf("\n%c", &redo);
	}
	while(redo == 'Y' || redo == 'y');
}
void modify(int SInfo[100][6], int TInfo[100][7], int CInfo[3][3], int TAssessment[100][6], int SAssessment[100][8])
{
    int choice;
    printf("\nWhat would you like to modify?\n1- A student and his/her information.\n2- A teacher and his/her information.\n3- A class' information.\n4- A teacher's assessment.\n5- A student's assessment.\n");
	scanf("%d", &choice);
	switch (choice)
	{
		case(1):
		{

			break;
		}
		case(2):
		{
			break;
		}
		case(3):
		{
			break;
		}
		case(4):
		{
			break;
		}
		case(5):
		{
			break;
		}
		default:
		{

		}
	}
}
void delete(int SInfo[100][6], int TInfo[100][7], int CInfo[3][3], int TAssessment[100][6], int SAssessment[100][8])
{
    int choice;
    printf("\nWhat would you like to delete?\n1- A student and his/her information.\n2- A teacher and his/her information.\n3- A class' information.\n4- A teacher's assessment.\n5- A student's assessment.\n");
	scanf("%d", &choice);
	switch (choice)
	{
		case(1):
		{

			break;
		}
		case(2):
		{
			break;
		}
		case(3):
		{
			break;
		}
		case(4):
		{
			break;
		}
		case(5):
		{
			break;
		}
		default:
		{

		}
	}
}
void assessmentteacher(int assessment[100][6])
{
    //prints the assessment and returns nothing
}
void assessmentstudent(int assessment [100][8])
{
    //prints the assessment and returns nothing
}
int searchstudent(int SInfo[100][6])
{
    //it's gonna return the address
}
int searchteacher(int TInfo[100][7])
{
    //WIP
}
void login(char user[256], char pass[256])
{
    while (1)
    {
        printf("Please enter your username:\n");
        scanf("%s", user);
        if(user != 'admin')
        {
            printf("Invalid Username.\n");
            continue;
        }
        else if(user == 'admin')
        {
            break;
        }
    }
    while(1)
    {
        printf("\nPlease enter your password:\n");
        scanf("%s", pass);
        if(pass != '12321')
        {
            printf("Invalid Password!\n");
            continue;
        }
        else if(pass == '12321')
        {
            admin();
        }
    }
}
void admin()
{
	int StudentInfo[100][6], TeacherInfo[100][7], classinfo[3][3], studentassessment[100][8], teacherassessment[100][6]; //char StName[256][256]
    int choice; char delchoice = 'a'; char search = 'a'; char searchagain = 'a'; char assessment = 'a';
    char assessmentagain = 'a'; char paymentchoice = 'a'; char redo = 'a';
	do
	{
        printf("What would you like to do?\n1- Add/Modify/Delete data.\n2- Search for a student or a teacher.\n3- Print assessment report for teacher/student.\n4- Print the payment info of a student.\n");
        scanf("%d", &choice);
        if(choice == 1)
        {
            printf("\nWhat would you like to do? (A/D/M)\n");
            scanf("\n%c", &delchoice);
            if(delchoice == 'A' || delchoice == 'a')
            {
                add(StudentInfo, TeacherInfo, classinfo, studentassessment, teacherassessment);
            }
            else if(delchoice == 'M' || delchoice == 'm')
            {
                modify(StudentInfo, TeacherInfo, classinfo, studentassessment, teacherassessment);
            }
            else if(delchoice == 'D' || delchoice == 'd')
            {
                delete(StudentInfo, TeacherInfo, classinfo, studentassessment, teacherassessment);
            }
        }
        else if(choice == 2)
        {
            do
            {
                printf("\nWhat would you like to search for? (S/T)\n");
                scanf("\n%c", &search);
                if(search == 'S' || search == 's')
                {
                    searchstudent(StudentInfo);
                }
                else if(search == 'T' || search == 't')
                {
                    searchteacher(TeacherInfo);
                }
                printf("\nWould you like to search for anything else? (Y/N)\n");
                scanf("\n%c", &searchagain);
            }
            while(searchagain == 'Y' || searchagain == 'y');
        }
        else if(choice == 3)
        {
            do
            {
                printf("\nWho would you like to print the assessment for? (S/T)\n");
                scanf("\n%c", &assessment);
                if(assessment == 'S' || assessment == 's')
                {
                    assessmentstudent(studentassessment);
                }
                else if(assessment == 'T' || assessment == 't')
                {
                    assessmentteacher(teacherassessment);
                }
                printf("\nWould you like to print another assessment? (Y/N)\n");
                scanf("\n%c", &assessmentagain);
            }
            while(assessmentagain == 'y' || assessmentagain 'Y');
        }
        else if(choice == 4)
        {
            do
            {
                payment(StudentInfo);
                printf("\nWould you like to print the payment info for another student? (Y/N)\n");
                scanf("\n%c", &paymentchoice);
            }
            while(paymentchoice == 'Y' || paymentchoice == 'y');
        }
		printf("\nWould you like to do anything else? (Y/N)\n");
		scanf("\n%c", &redo);
	}
	while(redo == 'Y' || redo == 'y');
}
int main()
{
    char user[256]; char pass[256];
    login(user, pass);
	return 0;
}