include <stdio.h> include <iostream> void main(){ while(1){ int nNum;printf("输入一个整数、");scanf("%d", &nNum);if (nNum == 0){ printf("%d是零\n", nNum);} else if (nNum>0){ printf("%d是正整数\n", nNum);} else { printf("%d是负整数\n", nNum);} ...