#include <iostream>
void main()
{
while(1)
int nNum;
printf("輸入壹個整數、");
scanf("%d", &nNum);
if (nNum == 0)
printf("%d是零\n", nNum);
}
else if (nNum>0)
printf("%d是正整數\n", nNum);
else
printf("%d是負整數\n", nNum);
} }