学步园




将第八周作业任务一定义的Complex类中的<<和>>运算符的重载，实现输入和输出，改造原程序中对运算结果的显示方式



#include<iostream>   
using namespace std;  
  
class Complex  
{  
public:  
    Complex(){real = 0;imag = 0;}  
    Complex(double r,double i){real = r;imag = i;}  
    Complex operator + (Complex & c2);  
    Complex operator - (Complex & c2);  
    Complex operator * (Complex & c2);  
    Complex operator / (Complex & c2);  
    friend ostream& operator << (ostream&,Complex&);//声明重载运算符“<<”函数   
private:  
    double real;  
    double imag;  
};  
  
//下面定义成员函数   
  
Complex Complex::operator + (Complex &c2)  
 {  
     return Complex(real + c2.real,imag + c2.imag);  
 }  
  
Complex Complex::operator - (Complex &c2)  
 {  
     return Complex(real - c2.real,imag - c2.imag);  
 }  
  
Complex Complex::operator * (Complex &c2)  
 {  
     return Complex(real * c2.real - imag * c2.imag,imag * c2.real + real * c2.imag);  
 }  
  
Complex Complex::operator / (Complex &c2)  
 {  
     return Complex((real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag),   
    (imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag));    
  
 }  
  
ostream& operator << (ostream& output,Complex& c)//定义重载运算符“<<”函数   
{  
    output << "(" << c.real << "," << c.imag << "i)" << endl;  
    return output;  
}  
  
 void main()  
 {  
     Complex c1(3,4),c2(5,-10),c3;  
     cout << "c1 = ";    
     cout << c1;    
     cout << "c2 = ";    
     cout << c2;    
     c3 = c1 + c2;  
     cout << "c1 + c2 = ";  
     cout << c3;  
     c3 = c1 - c2;  
     cout << "c1 - c2 = ";  
     cout << c3;  
     c3 = c1 * c2;   
     cout << "c1 * c2 = ";  
     cout << c3;  
     c3 = c1 / c2;  
     cout << "c1 / c2 = ";  
     cout << c3;  
     system("pause");  
 }   

上机感言：定义了<<和>>运算符的重载，只是在输入输出的时候加了两行代码。。