C++ 定义一个复数类Complex重载运算符 “+”, “-”, “ * ”, “ / ”........................

Question

定义一个复数类Complex重载运算符 “+”, “-”, “ * ”, “ / ”, 使之能用于复数的加，减，乘，除。运算符重载函数作为Complex类的成员函数。编程序，分别求两个复数的和，差，积，商。

Answer 1

#include <iostream>

using namespace std;

class CComplex
{
private:
float real, image;
public:
CComplex() { }
CComplex( float r, float img ) { real = r; image = img; }
CComplex( CComplex& another )
{
real = another.real;
image = another.image;
}

CComplex &operator = (CComplex &another )
{
real = another.real;
image = another.image;
return *this;
}

CComplex operator +( CComplex & another )
{
return CComplex( real+ another.real, image + another.image );
}

CComplex operator -( CComplex & another )
{
return CComplex( real- another.real, image - another.image );
}

CComplex operator *( CComplex & another )
{
CComplex prod;
//prod = *this;

prod.real = real*another.real - image*another.image;
prod.image = real*another.image + image*another.real;
return prod;

//return CComplex( real+ another.real, image + another.image );
}

CComplex operator /( CComplex & another )
{
CComplex quot;
float sq = another.real*another.real + another.image*another.image;

quot.real = (real*another.real + image*another.image)/sq;
quot.image = (image*another.real - real*another.image)/sq;

return quot;

}

};

void main()
{
CComplex c1( 2, 3 ), c2( 3, 3 );
CComplex c4, c5, c6, c7;
c4 = c1 + c2;
c5 = c1 - c2;
c6 = c1*c2;
c7 = c1/c2;

}