C++程序设计(第2版)课后习题答案第12章

// 文件complex.h: 复数类的定义
#ifndef __COMPLEX__H__
#define __COMPLEX__H__

class Complex
{
public:
    Complex(double = 0.0, double = 0.0);
    Complex operator + (const Complex &) const;
    Complex operator - (const Complex &) const;
    //Complex & operator = (const Complex &);
    void print()const;
    
private:
    double real; // 实数部分
    double imaginary; // 虚数部分
};

#endif
// 文件complex.cpp: 复数类的实现
#include <iostream.h>
#include "complex.h"

Complex::Complex(double r, double i)
{
    real = r;
    imaginary = i;
}

void Complex::print()const
{
    cout << '(' << real << ", " << imaginary << ')';
}

Complex Complex::operator + (const Complex &operand2) const
{
    Complex sum;
    sum.real = real + operand2.real;
    sum.imaginary = imaginary + operand2.imaginary;
    return sum;
}

Complex Complex::operator - (const Complex &operand2) const
{
    Complex diff;
    diff.real = real - operand2.real;
    diff.imaginary = imaginary - operand2.imaginary;
    return diff;
}

//Complex &Complex::operator = (const Complex &right)
//{
//    real = right.real;
//    imaginary = right.imaginary;
//    return  *this;
//}
// 文件ex13_1.cpp: 主函数定义，通过运算符操作复数对象
#include <iostream.h>
#include "complex.h"

int main()
{
    Complex x, y(4.3, 8.2), z(3.3, 1.1);
    
    // 输出x,y,z
    cout << "x: ";
    x.print();
    cout << "\ny: ";
    y.print();
    cout << "\nz: ";
    z.print();
    
    //输出加法运算
    x = y + z;
    cout << "\n\nx = y + z:\n";
    x.print();
    cout << " = ";
    y.print();
    cout << " + ";
    z.print();
    
    //输出减法运算
    x = y - z;
    cout << "\n\nx = y - z:\n";
    x.print();
    cout << " = ";
    y.print();
    cout << " - ";
    z.print();
    cout << '\n';
    
    return 0;
}