5:06:48 4.重载插入运算符与提取运算符:<> 对类X重载插入运算符的一般形式为 friend ostream operator<<(ostream & const X& 对类X重载提取运算符的一般形式为 friend istream opera tor>>(istream & X & 例:复数类对象的输入/输出 //Complex. h include <iostream> class Complex float real, image public friend std:: ostream operator<< (std:: ostream &os const Complex & c) friend std:: istream operator>>(std:: istream &is Complex c)15:06:48 4.重载插入运算符与提取运算符：<< >> 对类X重载插入运算符的一般形式为 friend ostream & operator<<(ostream &,const X&); 对类X重载提取运算符的一般形式为 friend istream & operator>>(istream &,X &); 例：复数类对象的输入/输出 //Complex.h #include <iostream> class Complex{ float real,image; public: … friend std::ostream & operator<< (std::ostream &os, const Complex & c); friend std::istream & operator>> (std::istream &is, Complex & c); };