100% prog to know how much memory struct variable takes

/* program to understand how memory is alloted for strutures*/
#include <stdio.h>
#include<stdlib.h>
void main()
{
    struct date
    {
        int day, month, year;
        char week_day;
    }d[3]; //to store three dates
    int i;
    for(i=0;i<3;i++)
    {
        printf("\n starting addresses of d[%d].day=%u, d[%d].month=%u,d[%d].char=%u",i,&d[i].day,i,&d[i].month,i,&d[i].week_day);
    }
    printf("\n starting address of d[0] is %u and d[1] is %u", &d[0], &d[1]);
    printf("\n size of 1 structure variable=%d",sizeof(d[0]));
}