第八周項目1-實現(xiàn)復數(shù)類中的運算符重載
來源：程序員人生 發(fā)布時間：2015-05-20 11:11:20 閱讀次數(shù)：4225次
（1）請用類的成員函數(shù)，定義復數(shù)類重載運算符+、-、*、/，使之能用于復數(shù)的加減乘除。
/*
* Copyright (c) 2015,煙臺大學計算機學院
* All right reserved.
* 作者：邵帥
* 文件：Demo.cpp
* 完成時間：2015年04月29日
* 版本號：v1.0
*/
#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;
};
//下面定義成員函數(shù)
Complex Complex::operator+(const Complex &c2)
{
Complex a;
a.real=real+c2.real;
a.imag=imag+c2.imag;
return a;
}
Complex Complex::operator-(const Complex &c2)
{
Complex a;
a.real=real-c2.real;
a.imag=imag-c2.imag;
return a;
}
Complex Complex::operator*(const Complex &c2)
{
Complex a;
a.real=real*c2.real;
a.imag=imag*c2.imag;
return a;
}
Complex Complex::operator/(const Complex &c2)
{
Complex a;
a.real=real/c2.real;
a.imag=imag/c2.imag;
return a;
}
void Complex::display()
{
cout<<"("<<real<<","<<imag<<"i)"<<endl;
}
//下面定義用于測試的main()函數(shù)
int main()
{
Complex c1(3,4),c2(5,⑴0),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;
}
（2）請用類的友元函數(shù)，而不是成員函數(shù)，再次完成上面提及的運算符的重載。
/*
* Copyright (c) 2015,煙臺大學計算機學院
* All right reserved.
* 作者：邵帥
* 文件：Demo.cpp
* 完成時間：2015年04月29日
* 版本號：v1.0
*/
#include <iostream>
using namespace std;
class Complex
{
public:
Complex(){real=0;imag=0;}
Complex(double r,double i){real=r; imag=i;}
friend Complex operator+(Complex &c1,Complex &c2);
friend Complex operator-(Complex &c1,Complex &c2);
friend Complex operator*(Complex &c1,Complex &c2);
friend Complex operator/(Complex &c1,Complex &c2);
void display();
private:
double real;
double imag;
};
//下面定義成員函數(shù)
Complex operator+(Complex &c1,Complex &c2)
{
Complex a;
a.real=c1.real+c2.real;
a.imag=c1.imag+c2.imag;
return a;
}
Complex operator-(Complex &c1,Complex &c2)
{
Complex a;
a.real=c1.real-c2.real;
a.imag=c1.imag-c2.imag;
return a;
}
Complex operator*(Complex &c1,Complex &c2)
{
Complex a;
a.real=c1.real*c2.real;
a.imag=c1.imag*c2.imag;
return a;
}
Complex operator/(Complex &c1,Complex &c2)
{
Complex a;
a.real=c1.real/c2.real;
a.imag=c1.imag/c2.imag;
return a;
}
void Complex::display()
{
cout<<"("<<real<<","<<imag<<"i)"<<endl;
}
//下面定義用于測試的main()函數(shù)
int main()
{
Complex c1(3,4),c2(5,⑴0),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;
}
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