use of array using structure

// C program to demonstrate the
// use of an array within a structure
#include <stdio.h>
  
// Declaration of the structure candidate
struct candidate {
    int roll_no;
    char grade;
  
    // Array within the structure
    float marks[4];
};
  
// Function to displays the content of
// the structure variables
void display(struct candidate a1)
{
  
    printf("Roll number : %d\n", a1.roll_no);
    printf("Grade : %c\n", a1.grade);
    printf("Marks secured:\n");
    int i;
    int len = sizeof(a1.marks) / sizeof(float);
  
    // Accessing the contents of the
    // array within the structure
    for (i = 0; i < len; i++) {
        printf("Subject %d : %.2f\n",
               i + 1, a1.marks[i]);
    }
}
  
// Driver Code
int main()
{
    // Initialize a structure
    struct candidate A
        = { 1, 'A', { 98.5, 77, 89, 78.5 } };
  
    // Function to display structure
    display(A);
    return 0;
}