运算符重载 成员函数


/* 
*Copyright(c) 2016.烟台大学计算机与控制工程学院 
*ALL rights  reserved. 
*文件名称：test.cpp 
*作者：隋宗涛
*完成日期：2016年5月14日 
*问题描述:请用类的成员函数，定义复数类重载运算符+、-、*、/，使之能用于复数的加减乘 
*/  
#include<iostream>  
using namespace std;  
class Complex  
{  
public:  
    Complex(){real=0;imag=0;}  
    Complex(double r,double i){real=r; imag=i;}  
    Complex operator+(const Complex &c2);  
    Complex operator-(const Complex &c2);  
    Complex operator*(const Complex &c2);  
    Complex operator/(const Complex &c2);  
    void display();  
private:  
    double real;  
    double imag;  
};  
//下面定义成员函数  
//复数相加： (a+bi)+(c+di)=(a+c)+(b+d)i  
Complex Complex::operator+(const Complex &c2)  
{  
    Complex c;  
    c.real=real+c2.real;  
    c.imag=imag+c2.imag;  
    return c;  
}  
//复数相减： (a+bi)-(c+di)=(a-c)+(b-d)i  
Complex Complex::operator-(const Complex &c2)  
{  
    Complex c;  
    c.real=real-c2.real;  
    c.imag=imag-c2.imag;  
    return c;  
}  
//复数相乘：(a+bi)(c+di)=(ac－bd)+(bc+ad)i  
Complex Complex::operator*(const Complex &c2)  
{  
    Complex c;  
    c.real=real*c2.real-imag*c2.imag;  
    c.imag=imag*c2.real+real*c2.imag;  
    return c;  
}  
  
//复数相除：(a+bi)/(c+di)=(ac+bd)/(c*c+d*d) +(bc-ad)/(c*c+d*d)i  
Complex Complex::operator/(const Complex &c2)  
{  
    Complex c;  
    c.real=(real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);  
    c.imag=(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);  
    return c;  
}  
 void Complex::display()  
{  
    cout<<"("<<real<<","<<imag<<"i)"<<endl;  
}  
//下面定义用于测试的main()函数  
int main()  
{  
    Complex c1(3,4),c2(5,-10),c3;  
    cout<<"c1=";  
    c1.display();  
    cout<<"c2=";  
    c2.display();  
    c3=c1+c2;  
    cout<<"c1+c2=";  
    c3.display();  
    c3=c1-c2;  
    cout<<"c1-c2=";  
    c3.display();  
    c3=c1*c2;  
    cout<<"c1*c2=";  
    c3.display();  
    c3=c1/c2;  
    cout<<"c1/c2=";  
    c3.display();  
    return 0;  
}  

/*
*Copyright(c) 2016.烟台大学计算机与控制工程学院
*ALL rights  reserved.
*文件名称：test.cpp
*作者：杨驰
*完成日期：2016年5月14日
*问题描述:请用类的成员函数，定义复数类重载运算符+、-、*、/，使之能用于复数的加减乘
*/
#include<iostream>
using namespace std;
class Complex
{
public:
Complex(){real=0;imag=0;}
Complex(double r,double i){real=r; imag=i;}
Complex operator+(const Complex &c2);
Complex operator-(const Complex &c2);
Complex operator*(const Complex &c2);
Complex operator/(const Complex &c2);
void display();
private:
double real;
double imag;
};
//下面定义成员函数
//复数相加： (a+bi)+(c+di)=(a+c)+(b+d)i
Complex Complex::operator+(const Complex &c2)
{
Complex c;
c.real=real+c2.real;
c.imag=imag+c2.imag;
return c;
}
//复数相减： (a+bi)-(c+di)=(a-c)+(b-d)i
Complex Complex::operator-(const Complex &c2)
{
Complex c;
c.real=real-c2.real;
c.imag=imag-c2.imag;
return c;
}
//复数相乘：(a+bi)(c+di)=(ac－bd)+(bc+ad)i
Complex Complex::operator*(const Complex &c2)
{
Complex c;
c.real=real*c2.real-imag*c2.imag;
c.imag=imag*c2.real+real*c2.imag;
return c;
}

//复数相除：(a+bi)/(c+di)=(ac+bd)/(c*c+d*d) +(bc-ad)/(c*c+d*d)i
Complex Complex::operator/(const Complex &c2)
{
Complex c;
c.real=(real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
c.imag=(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
return c;
}
void Complex::display()
{
cout<<"("<<real<<","<<imag<<"i)"<<endl;
}
//下面定义用于测试的main()函数
int main()
{
Complex c1(3,4),c2(5,-10),c3;
cout&l
4000
t;<"c1=";
c1.display();
cout<<"c2=";
c2.display();
c3=c1+c2;
cout<<"c1+c2=";
c3.display();
c3=c1-c2;
cout<<"c1-c2=";
c3.display();
c3=c1*c2;
cout<<"c1*c2=";
c3.display();
c3=c1/c2;
cout<<"c1/c2=";
c3.display();
return 0;
}

运行结果：