符号函数啊

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