//  推断一个数是奇偶数

#include <stdio.h>

void judge_sd(int a)
{
	if ((a & 1) == 0)
	{
		printf("是偶数\n");
		return;
	}
	else
	{
		printf("是奇数\n");
		return;
	}
}

int main()
{
	judge_sd(0);
	judge_sd(1);
	judge_sd(4);
	return 0;
}