cpp/C5/P4/c4-5-1.c

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