对象的常引用

 1 #include <iostream>
 2 
 3 /* run this program using the console pauser or add your own getch, system("pause") or input loop */
 4 using namespace std;
 5 class Time
 6 {
 7     public:
 8         Time(int,int,int);
 9         int hour;
10         int minute;
11         int sec;
12 };
13 
14 Time::Time(int h,int m,int s)
15 {
16     hour=h;
17     minute=m;
18     sec=s;
19 }
20 
21 void fun(Time &t)
22 {
23     t.hour=18;
24 }
25 
26 int main(int argc, char** argv) {
27     
28     Time t1(10,13,56);
29     fun(t1);
30     cout<<t1.hour<<endl;
31     cout<<t1.minute<<endl;
32     return 0;
33 }