程序代码：

#include<stdio.h>

 void main()
{
    float x;
    int y;
    printf("please enter the number:\n");
    scanf("%f",&x);
    printf("x=%.lf\n",x);
    if (x<0)y=-1;
    else if (x==0)y=0;
            else y=1;
    printf("y=%d\n",y);
    
}