#include <stdio.h>
    struct test{
        int age;
        char s[100];
        int mark;
    };

    int main() 
     {
        struct test a[4];
        for(int i=0;i<4;i++)
        {

            printf("enter the age %d\n",i+1.":");
            scanf("%d",&a[i].age);
            printf("enter the name :%d\n",i+1);
            scanf("%s",a[i].s);
            printf("enter the mark :%d\n",i+1);
            scanf("%d",&a[i].mark);
        }
        for(int i=1;i<4;i++)
        {
            printf(" stu age :%d",i+1);
            printf("%d\n",a[i].age);
             printf("stu name :%d",i+1);
            printf("%s\n",a[i].s);
            printf("stu mark :%d",i+1);
            printf("%d\n",a[i].mark);
        }
      
    }