【c语言】有一函数：x < 0 ,y = -1;x = 0,y = 0;x > 0,y = 1，编程输入一个x值，要求输出对应的y

// 有一函数：x < 0 ,y = -1;x = 0,y = 0;x > 0,y = 1，编程输入一个x值，要求输出对应的y

#include  <stdio.h>

int main()
{
	int x,y;
	printf("请输入x:");
	scanf("%d",&x);
	if(x > 0)
		y = 1;
	else if(x < 0)
		y = -1;
	else
		y = 0;
	printf("对应的y值是：%d\n",y);
	return 0;
}

<img src="http://img.blog.csdn.net/20150423122047958?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvemhhb3lhcWlhbjU1Mg==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

<img src="http://img.blog.csdn.net/20150423122053044?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvemhhb3lhcWlhbjU1Mg==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

<img src="http://img.blog.csdn.net/20150423122057927?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvemhhb3lhcWlhbjU1Mg==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />