Struct Deep Example

code:

#include<stdio.h>
struct s1
{
    int roll;
    float gpa;
};
struct s2
{
    char name[100];
    char classe[20];
    struct s1 info;
};

int main()
{

    struct s2 student= {"Zaki","Twelve",12,5.0};
    printf("Name: %s\n",student.name);
    printf("Class %s\n",student.classe);
    printf("Roll: %d\n",student.info.roll);
    printf("GPA %f\n",student.info.gpa);


    return 0;
}

struct some other beautiful example:
code:

#include<stdio.h>
struct employee
{
    char name[100];
    int salary;
    struct salary
    {
        int hour;
        int day;
        int cost;
    } d;
};


int main()
{
    struct employee person;
    printf("Enter employee name:");
    gets(person.name);
    printf("Enter per day work hour:");
    scanf("%d",&person.d.hour);
    printf("Enter per hour cost:");
    scanf("%d",&person.d.cost);
    printf("Enter work day in a month:");
    scanf("%d",&person.d.day);
    person.salary=person.d.hour*person.d.cost*person.d.day;
    printf("%s's total salary is %d.",person.name,person.salary);


    return 0;

}