C++ 操作符重载

 1 #include <iostream>
 2 #include <string.h>
 3 using namespace std;
 4 
 5 // 假装写一个输出类
 6 class Output
 7 {
 8 public:
 9     // 操作符重载方式一
10     Output& operator>>(string b)
11     {
12         cout << b;
13         return *this;
14     }
15 
16     // 操作符重载方式二
17     friend Output& operator>>(Output& out, int i)
18     {
19         cout << "output a integer: " << i;
20         return out;
21     }
22 
23     Output operator!(void)
24     {
25         cout << "Hehe!\n";
26         return *this;
27     }
28 };
29 
30 int main()
31 {
32     Output out;
33     string hello = "Hello, world!\n";
34     out >> hello;
35     out >> "Hello, world!\n";
36     out >> "Hello, world!\n" >> "Good Bye!\n";
37     out = !out;
38 
39     out >> 23333 >> "\n";
40 
41     cout << "hello world" << endl;
42     return 0;
43 }