代码
#include <stdio.h>
int main()
{
    int x;
	int y;
	printf("enter x.");
	scanf("%d",&x);
	if(x!=0)
	{
		if(x>0)
			y=1;
		else
			y=-1;
	}
	else 
		y=0;
	printf("x=%d,y=%d\n",x,y);
	return 0;
}
      #include <stdio.h>
int main()
{
    int x;
	int y;
	printf("enter x.");
	scanf("%d",&x);
	if(x!=0)
	{
		if(x>0)
			y=1;
		else
			y=-1;
	}
	else 
		y=0;
	printf("x=%d,y=%d\n",x,y);
	return 0;
}