#include <stdio.h>
    struct p
    {
        unsigned int x : 1;
        unsigned int y : 1;
    };
    int main()
    {
        struct p p;
        p.x = 1;
        p.y = 2;
        printf("%d\n", p.y);
    }

void main()
{
      struct xx
      {
            int x=3;
            char name[] = "hello";
      };
      struct xx *s = malloc(sizeof(struct xx));
      printf("%d", s->x);
      printf("%s", s->name); 
}

void main()
{
      extern int i;
      i=20;
      printf("%d", sizeof(i));
}

#include<stdio.h>
int main()
{
    union a
    {
        int i;
        char ch[2];
    };
    union a u;
    u.ch[0] = 3;
    u.ch[1] = 2;
    printf("%d, %d, %d\n", u.ch[0], u.ch[1], u.i);
    return 0;
}

#include<stdio.h>
struct emp
{
    char name[20];
    int age;
};
int main()
{
    emp int xx;
    int a;
    printf("%d\n", &a);
    return 0;
}

typedef enum error { warning, test, exception } err;

1 :	
struct aa
{
    int a;
    float b;
};

2 :	
struct aa
{
    int a;
    float b;
    struct aa var;
};

3 :	
struct aa
{
    int a;
    float b;
    struct aa *var;
};

1 :	
struct book
{
    char name[10];
    float price;
    int pages;
};

2 :	
struct aa
{
    char name[10];
    float price;
    int pages;
}

3 :	
struct aa
{
    char name[10];
    float price;
    int pages;
}