输入x计算分段函数sign(x)的值,要求定义和调用sign(x),实现函数sign(x)=1 (x>0)谢谢了,

#include <iostream.h> int sign(double x) { return x > 0 1 :0; } int main() { int x; scanf("%d",&x); printf("%d\n",sign(x)); system("pause"); return 0; } //补充一下,还不知道当x<=0时,sign(x)等于多少呢