软件技术基础与开发 PPT - Class03 - 作业答案

复数类complex的实现——答案

1. 首先是头文件ClassComplexNumber.h，其给出了复数类complex的定义。

// 复数类头文件_示例程序
#ifndef complex_H
#define complex_H

class complex
{
private:
	double m_real;	// 实数部分
	double m_imag;	// 虚数部分
public:
	complex(double r=0.0,double i=0.0); //构造函数
	complex(const complex & cp);	// 构造函数
	~complex();						// 析构函数，啥也不做

	// 设置实数部分、虚数部分、整体复数的函数
	void setReal(double real);
	void setImag(double imag);
	void setValue(double real, double imag);

	// 提取实数部分、虚数部分的函数
	double getReal() const;
	double getImag() const;
	
	// 判断两个复数是否相等
	friend bool operator==(const complex & lhs, const complex & rhs);

	// 此复数与另一个复数相加
	void addAnotherComplex(const complex & cp);
	
	//输出复数
	void display();	
};

#endif

2. 接下来是类的ClassComplexNumber.cpp实现文件，其给出了类的成员函数实现。

#include "ClassComplexNumber.h"

#include <iostream>
using namespace std;

complex::complex(double r,double i) //构造函数
{	
	m_real = r;		
	m_imag = i;
	cout << "Construct complex number with real and image part: " 
		 << "( " << r << ", " << i << " )" << endl;
}

complex::complex(const complex & cp)	// 构造函数
{	
	m_real = cp.m_real;
	m_imag = cp.m_imag;	
	cout << "Construct complex number with another complex nubmer : " 
		 << "( " << cp.m_real << ", " << cp.m_imag << " )" << endl;
}

complex::~complex()	// 析构函数，啥也不做
{
	cout << "Destructor, do nothing! " << endl;
}

// 设置实数部分、虚数部分、整体复数的函数
void complex::setReal(double real)
{
	cout << "Set real part to " << real << endl;
	m_real = real;	
}

void complex::setImag(double imag)
{	
	cout << "Set imag part to " << imag << endl;
	m_imag = imag;	
}

void complex::setValue(double real, double imag)
{	
	m_real = real;	
	m_imag = imag;
	cout << "Set complex number value to : " 
		 << "( " << real << ", " << imag << " )" << endl;
}

// 提取实数部分、虚数部分的函数
double complex::getReal() const
{	
	return m_real;	
}

double complex::getImag() const
{	
	return m_imag;	
}
	
// 判断两个复数是否相等
bool operator==(const complex & lhs, const complex & rhs)
{
	return ((lhs.m_real == rhs.m_real) && (lhs.m_imag == rhs.m_imag));
}

// 此复数与另一个复数相加
void complex::addAnotherComplex(const complex & cp)
{
	cout << "( " << m_real << ", " << m_imag << " ) + "
		<< "( " << cp.getReal() << ", " << cp.getImag() << " ) ";
	m_real += cp.m_real;
	m_imag += cp.m_imag;
	cout << "= "
		 << "( " << m_real << ", " << m_imag << " )" << endl;
}

void complex::display()	//输出复数
{
	/*if (m_imag < 0)
	{
		cout << m_real << m_imag<< "i" << endl;
	}
	else
	{  
		cout << m_real << "+" << m_imag << "i" << endl;
	}*/
	cout << "Complex number value is : " 
		 << "( " << m_real << ", " << m_imag << " )" << endl;
}

3. 最后是主函数main.cpp，用来测试complex的定义和实现是否正确。

#include <iostream>
#include "ClassComplexNumber.h"
using namespace std;

int main()     //主函数
{
   complex c1(5, 4);
   complex c2(c1);
   
   c1.display();
   c2.display();

   c2.setReal(10);
   c2.display();

   c2.setImag(13);
   c2.display();

   c2.setValue(7, 9);
   c2.display();

   c1.addAnotherComplex(c2);
   c1.display();

   cout << c1.getReal() << endl;
   cout << c1.getImag() << endl;
   cout << (c1 == c2) << endl;

   return 0;
}

运行结果截图如下，可见该复数类complex成功实现了复数的定义和一些简单操作

标签：const,double,complex,复数,PPT,软件技术,c2,Class03,display
来源： https://blog.csdn.net/meiguanhua/article/details/100885289