#include <stdio.h>

typedef union {
	int x;
	char c;
} union_b;

int main(void)
{
	union_b a;

	a.x = 65;
	printf("%d, \"%c\"\n", a.x, a.c);

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

	a.x = 66;
	printf("%d, \"%c\"\n", a.x, a.c);

	return 0;
}