how to create a loop in grading system

hi.. i need to put loop in my program base on the out put given. can anyone advice how create loop in my program. here is the output

Enter no. of students: 3
Enter no. of courses: 3


>>Enter student ID: 123
>>Enter marks for 123:
Enter mark for course #1: 56
Grade: D
Enter mark for course #2: 45

Grade: E
Enter mark for course #3: 89

Grade: A
Total Marks = 190

Average Mark = 63.33
>>PROCEED TO THE NEXT SEMESTER...

>>Enter student ID: █


Here is my programme which i need to put loop.

Code:

---

#include <stdio.h>
  int main()
{
    int marks, stud, cours, total, sum;
   
    printf( " Enter No Of Students :");
    scanf("%d", &stud);
    printf(" Enter No 0f Course :");
    scanf("%d", &cours);
    printf("Enter Mark :");
    scanf("%d", &marks);
   
    {
   
    if( marks >= 80 && marks <= 100)
            printf( " Grade A");
           
    else if(marks >= 70  )
            printf( " Grade B");
         
  else if( marks >= 60  )
            printf( " Grade C");
     
      else if( marks  >= 50  )
            printf( " Grade D");
       
    else if( marks >= 40  )
            printf( " Grade E");
           
    else if(  marks >= 0 && marks <= 39)
            printf( " Grade F");
   
    }
    return 0;
}

---

http://cboard.cprogramming.com/c-pro...t-process.html

So in the first instance, you make

Code:

---

#include <stdio.h>
void gradeStudent( ) {
    int marks, stud, cours, total, sum;
   
    printf( " Enter No Of Students :");
    scanf("%d", &stud);
    printf(" Enter No 0f Course :");
    scanf("%d", &cours);
    printf("Enter Mark :");
    scanf("%d", &marks);
   
    {
   
    if( marks >= 80 && marks <= 100)
            printf( " Grade A");
           
    else if(marks >= 70  )
            printf( " Grade B");
         
  else if( marks >= 60  )
            printf( " Grade C");
     
      else if( marks  >= 50  )
            printf( " Grade D");
       
    else if( marks >= 40  )
            printf( " Grade E");
           
    else if(  marks >= 0 && marks <= 39)
            printf( " Grade F");
   
    }
}

int main()
{
    gradeStudent();
    return 0;
}

---

But then perhaps, the number of students is the loop variable, so move that part back to main

Code:

---

int main()
{
    int stud;
    printf( " Enter No Of Students :");
    scanf("%d", &stud);

    gradeStudent();
    return 0;
}

---

From there, it's an easy step to
for ( i = 0 ; i < stud

Well, I'm sure you can take it from there.....