清华大学谭浩强教授的C++教程

				例10.8 在例10.7的基础上，增加重载流提取运算符“>>”，用“cin>>”输入复数，用“cout				#include 
				using namespace std;
				class Complex
				{public:
				friend ostream& operator 				friend istream& operator >> (istream&,Complex&);    //声明重载运算符“>>”
				private:
				double real;
				double imag;
				};
				ostream& operator 				{output				return output;
				}
				istream& operator >> (istream& input,Complex& c)     //定义重载运算符“>>”
				{cout				input>>c.real>>c.imag;
				return input;
				}
				int main( )
				{Complex c1,c2;
				cin>>c1>>c2; 
				cout				cout				return 0;
				}