//  不用大与小与号，求两数最大值

#include <stdio.h>

int max(int a, int b)

{

	int c = a - b;

	int d = 1 << 31;

	if ((c&d) == 0)

	{

		return a;

	}

	else

	{

		return b;

	}

}

int main()

{

	printf("%d是大数\n", max(0, 2));

	printf("%d是大数\n", max(3, 4));

	printf("%d是大数\n", max(-1, 5));

	return 0;

}