第八周实验报告1.3

实验目的：在方案二的基础上扩充+ - * / 运算符的功能

实验代码：

#include <iostream>

#include <cmath>

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);

	Complex operator + (double d);
	Complex operator - (double d);
	Complex operator * (double d);
	Complex operator / (double d);

    Complex operator - ();
	void display();
private:
	double real;
	double imag;
};

int main()
{
	Complex c1(3, 4), c2(5, -10), 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();

	c3 = c1 + 2;
	cout << "c1 + 2 = ";
	c3.display();

	c3 = c1 - 4;
	cout << "c1 - 4 = ";
	c3.display();

	c3 = c2 * 2;
	cout << "c2 * 2 = ";
	c3.display();

	c3 = c2 / 2.5;
	cout << "c2 / 2.5 = ";
	c3.display();

	c1 = - c1;
	cout << "-c1 = ";
	c1.display();
    c2 = - c2;
	cout << "-c2 = ";
	c2.display();
	system("pause");
	return 0;
}

Complex operator + (Complex &c1, Complex &c2)
{
	Complex c;
	c.real = c1.real + c2.real;
	c.imag = c1.imag + c2.imag;
	return c;
}
Complex operator - (Complex &c1, Complex &c2)
{
	Complex c;
	c.real = c1.real - c2.real;
	c.imag = c1.imag - c2.imag;
	return c;
}
Complex operator * (Complex &c1, Complex &c2)
{
	Complex c;
	c.real = (c1.real * c2.real) - (c1.imag * c2.imag);
	c.imag = (c1.imag * c2.real) + (c1.real * c2.imag);
	return c;
}
Complex operator / (Complex &c1, Complex &c2)
{
	Complex c;
	c.real = ((c1.real * c2.real) + (c1.imag * c2.imag)) / (pow(c2.real, 2) + pow(c2.imag, 2));
	c.imag = ((c1.imag * c2.real) - (c1.real * c2.imag)) / (pow(c2.real, 2) + pow(c2.imag, 2));
	return c;
}

void Complex::display()
{
	cout << "(" << real << ", " << imag << "i)" << endl;
}

Complex Complex::operator + (double d)
{
	Complex c;
	c.real = real + d;
	c.imag = imag;
	return c;
}
Complex Complex::operator - (double d)
{
	Complex c;
	if(real > d)
	{
	    c.real = real - d;
	 }
	else
	{
		c.real = -(d - real);
	}
	c.imag = imag;
	return c;
}
Complex Complex::operator * (double d)
{
	Complex c;
	c.real = real * d;
	c.imag = imag * d;
	return c;
}
Complex Complex::operator / (double d)
{
	Complex c;
	c.real = real / d;
	c.imag = imag / d;
	return c;
}
Complex Complex::operator - ()
{
	Complex c;
	c.real = 0 - real;
	c.imag = 0 - imag;
	return c;
}

实验结果截图：

实验心得：

依然没什么难度的题目，大概因为是第一个任务，老师怕吓到我们，所以给的题目相对简单吧，方案三算是在方案一、二之上的扩充吧，重点还是运载符的重载啦，所以，感觉能做出方案一和二的话，理解上应该就没有什么障碍了，也就能很顺手的编写方案三的代码啦。