#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
int num;
scanf("%d",&num);
if (num>0)
printf("%d",1);
else if (num<0)
printf("%d",-1);
else
printf("%d",0);
system("PAUSE");
return 0;
}
思考,如果输入的是浮点数的情况,程序如下:
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
float num;
scanf("%f",&num);
if (num>0)
printf("%d",1);
else if (num<0)
printf("%d",-1);
else
printf("%d",0);
system("PAUSE");
return 0;
}