用switch语句编程实现：y=-1(x1)

用switch语句编程实现：y=-1(x1)
用switch语句编程实现：y=-1(x1)

用switch语句编程实现：y=-1(x1)
#include
void main()
{
int x,y;
printf("请输入x：");
scanf("%d",&x);
switch(x>0)
{

case 1: printf("1\n");break;
case 0: switch(x==0)
{
case 1:printf("0\n");break;
case 0:printf("-1\n");break;}
}
}