#include <stdio.h>

struct s {
    int a[3];
};

int main(void)
{
    struct s x = {{10, 20, 30}};
    struct s y = {{40, 50, 60}};

    /* x.a = y.a; */
    printf("x.a[1] = %d\n", x.a[1]);

    x = y;
    printf("x.a[1] = %d\n", x.a[1]);

    return 0;
}