structures

 #include<stdio.h>

struct student{

    int rollno;

    char  name[50];

    int marks;

};

int main()

{

struct student s1,s2,s3;

printf("enter rollno:");

scanf("%d",&s1.rollno);

printf("enter name:");

scanf("%s",s1.name);

printf("enter marks:");

scanf("%d",&s1.marks);

printf("enter rollno:");

scanf("%d",&s2.rollno);

printf("enter name:");

scanf("%s",s2.name);

printf("enter marks:");

scanf("%d",&s2.marks);

printf("enter rollno:");

scanf("%d",&s3.rollno);

printf("enter name:");

scanf("%s",s3.name);

printf("enter marks:");

scanf("%d",&s3.marks);

}