一道复数类C++的题帮忙！！！！！！！！！！

Question

编写一个复数类，使用成员函数或友元函数，重载运算符
" + "，"－"，" * "，" / "。

怎么做？？谢谢大家了
还有它的理论和数据结论是什么呢？

Answer 1

#include "stdafx.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <iostream.h>

#define PRECISION 0.0000000000000001 //要求精度
//我们知道float和double不能直接和0比较
//float的精度只有6位，double是15到16位

class CComplex{
public:
//构造函数
CComplex(double realPart_value = 0.0, double imagePart_value = 0.0)
{
realPart = realPart_value;
imagePart = imagePart_value;
}

//打印函数
void print() const
{
cout<<"RealPart:"<<realPart<<" ImagePart:"<<imagePart<<endl;
}

//重载‘+’
CComplex operator +(CComplex &c); //两个复数相加
CComplex operator +(double r); //复数和一个实数相加

//重载'-'
CComplex operator -(CComplex &c); //同上
CComplex operator -(double r);

//重载'*'
CComplex operator *(CComplex &c);
CComplex operator *(double r);

//重载'/'
CComplex operator /(CComplex &c);
CComplex operator /(double r);

private:
double realPart; //实部
double imagePart; //虚部

};

CComplex CComplex::operator +(CComplex &c)
{
CComplex temp;
temp.realPart = realPart + c.realPart;
temp.imagePart =imagePart + c.imagePart;
return temp;
}

CComplex CComplex::operator +(double c)
{
CComplex temp;
temp.realPart = realPart + c;
temp.imagePart = imagePart;
return temp;
}

CComplex CComplex::operator -(CComplex &c)
{
CComplex temp;
temp.realPart = realPart - c.realPart;
temp.imagePart =imagePart - c.imagePart;
return temp;
}

CComplex CComplex::operator -(double c)
{
CComplex temp;
temp.realPart = realPart - c;
temp.imagePart = imagePart;
return temp;
}

CComplex CComplex::operator *(CComplex &c)
{
CComplex temp;
temp.realPart = realPart * c.realPart - imagePart * c.imagePart;
temp.imagePart =realPart * c.imagePart + imagePart * c.realPart;
return temp;
}

CComplex CComplex::operator *(double c)
{
CComplex temp;
temp.realPart = realPart * c;
temp.imagePart = imagePart * c;
return temp;
}

CComplex CComplex::operator /(CComplex &c)
{
if((c.realPart >(-PRECISION) && c.realPart < PRECISION)
&& (c.imagePart > (-PRECISION) && c.imagePart < PRECISION))
{
cout<<"The divisor can not be zero!"<<endl;
exit(-1);
}
double div = c.realPart * c.realPart + c.imagePart * c.imagePart; //分母先提出来
CComplex temp;
temp.realPart = (realPart * c.realPart + imagePart * c.imagePart) / div;
temp.imagePart = (imagePart * c.realPart - realPart * c.imagePart) / div;
return temp;
}

CComplex CComplex::operator /(double c)
{
if(c >(-PRECISION) && c < PRECISION ) //被除数不能为零，其实太小了也不行，我们否则会溢出
{
cout<<"The divisor can not be zero!"<<endl;
exit(-1);
}
CComplex temp;
temp.realPart = realPart / c;
temp.imagePart = imagePart / c;
return temp;
}

//主函数和先关测试
int main(int argc, char* argv[])
{

CComplex c1(10.0, 10.0);
CComplex c2(10.0, 10.0);
c1.print();
c2.print();

CComplex temp(0, 0);
//加 ‘+’
temp = c1 + c2;
temp.print();

temp = c1 + 10;
temp.print();

//减 ‘-’
temp = c1 - c2;
temp.print();

temp = c1 - 10;
temp.print();

//乘 ‘*’
temp = c1 * c2;
temp.print();

temp = c1 * 10;
temp.print();

//除 ‘/’
temp = c1 / c2;
temp.print();

temp = c1 / 10;
temp.print();
return 0;
}