#include <stdio.h>

struct a_xy {
    int x;
    int y;
};

struct b_xy {
    int x;
    int y;
};

int main(void)
{
    struct a_xy a = {10, 20};
    struct b_xy b = {30, 40};

    a.x = b.x;
    printf("a.x = %d\n", a.x);

    
    printf("a.y = %d\n", a.y);

    return 0;
}