第一个C++例子

 #include <iostream>
 using namespace std;
 
 class Time
 {
 private:
     int hour;
     int minute;
     int second;
 public:
     //Time() //无参够创函数
     //{
     //    hour = 0; minute = 0; second = 0;
     //}
     //Time(int h, int m, int s) //带参构造函数
     //{
     //    hour = h; minute = m; second = s;
     //}
     Time(int h = , int m = , int s = ) : hour(h), minute(m), second(s){} //带参数初始化表的构造函数
     void Set(int h, int m, int s);
     void Show();
 };
 
 void Time::Set(int h, int m, int s)
 {
     hour = h; minute = m; second = s;
 }
 void Time::Show()
 {
     cout << hour << ":" << minute << ":" << second << endl;
 }
 
 int main()
 {
     Time t1;
     t1.Show();
     t1.Set(, , );
     t1.Show();
 
     Time t2(, , );
     t2.Show();
 
     return ;
 }