# include <iostream> using namespace std ; class clock { public : void settime ( int newh = 0 , int newm = 0 , int news = 0 ) ; void showtime ( ) ; private : int hour , minute , second ; } ; void clock :: settime ( int newh , int newm , int news ) { hour = newh ; minute = newm ; second = news ; } void clock :: showtime ( ) { cout << hour << " " << minute << " " << second ; } int main ( ) { clock c1 ; clock c2 ; //定义两个时钟对象c1和c2 c1 . settime ( ) ; //未定义时间,则输出默认值 c1 . showtime ( ) ; cout << endl ; c2 . settime ( 8 , 30 , 30 ) ; c2 . showtime ( ) ; } 来源: CSDN 作者: 小白在路上哈哈哈 链接: https://blog.csdn.net