Array of Structures in C with example

Like normal arrays of integer, floats etc which have elements of type integer, float respectively, array of structures is nothing but a collection of structures. It means elements of array will be structures not normal type ( integer, float etc.).

Consider following example:

  #include<stdio.h>

   struct student{

       int rollno;

       float marks;

   };

int main(){

   struct student s1;

   s1.rollno=12;

   s1.marks=92.5;

  

   printf("\nStudent 1 Details\n");

   printf("\nRoll No:%d",s1.rollno);

   printf("\nMarks:%.2f\n",s1.marks);

 return 0;

}

In above program, we have declared one structure variable s1 for one student. What if we want to store roll no and marks of 40 students of a class? We have two options either we declare 40 structure variables (s1 to s40) or simply create an array of structures of size 40 as explained in below program:

 

#include<stdio.h>

   struct student{

       int rollno;

       float marks;

   };

int main(){

   struct student s[5];

   int i;

   printf("\nEnter Students Details\n");

   for(i=0;i<5;i++){

       printf("\nEnter Roll No and marks of student %d\n",i+1);

       scanf("%d",&s[i].rollno);

       scanf("%f",&s[i].marks);

   }

  

   printf("\nStudents Details\n");

   for(i=0;i<5;i++){

      printf("\nRoll No and marks of student %d are %d and %f respectively\n",i+1,s[i].rollno,s[i].marks);

   }

 return 0;

}

Output:

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