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C Program to Read and Print details of 50 Students using Structure

C Program to Read and Print details of 50 Students using Structure

The annual examination is conducted for 50 students for three subjects. Write a program to read the data and determine the following:

Total marks obtained by each student.
The highest marks in each subject and the Roll No. of the student who secured it.
The student who obtained the highest total marks.

#include<stdio.h>
#define SIZE 50

struct student {
   char name[30];
   int rollno;
   int sub[3];
};

void main() {
   int x, j, max, count, total, n, a[SIZE], nx;
   struct student st[SIZE];
   clrscr();

   printf("Enter how many students: ");
   scanf("%d", &n);

   /* for loop to read the names and roll numbers*/
   for (x = 0; x < n; x++) {
      printf("\nEnter name and roll number for student %d : ", x);
      scanf("%s", &st[x].name);
      scanf("%d", &st[x].rollno);
   }

   /* for loop to read xth student's jth subject*/
   for (x = 0; x < n; x++) {
      for (j = 0; j <= 2; j++) {
         printf("\nEnter marks of student %d for subject %d : ", x, j);
         scanf("%d", &st[x].sub[j]);
      }
   }

   /* (x) for loop to calculate total marks obtained by each student*/

   for (x = 0; x < n; x++) {
      total = 0;
      for (j = 0; j < 3; j++) {
         total = total + st[x].sub[j];
      }
      printf("\nTotal marks obtained by student %s are %dn", st[x].name,total);
      a[x] = total;
   }

   /* (xx) for loop to list out the student's roll numbers who
    have secured the highest marks in each subject */

   /* roll number who secured the highest marks */

   for (j = 0; j < 3; j++) {
      max = 0;
      for (x = 0; x < n; x++) {
         if (max < st[x].sub[j]) {
            max = st[x].sub[j];
            nx = x;
         }
      }
      printf("\nStudent %s got maximum marks = %d in Subject : %d",st[nx].name, max, j);
   }

   max = 0;

   for (x = 0; x < n; x++) {
      if (max < a[x]) {
         max = a[x];
         nx = x;
      }
   }

   printf("\n%s obtained the total highest marks.", st[nx].name);
   getch();
}