main.cpp

实现运算符的重载！！让出学者有个模版来参考

#include <iostream>

using namespace std;

class complex
{
public:
	complex();
	complex(complex &a);
	complex(double r,double i);
	void display();
	void operator=(complex a);
	complex operator+(complex a);
	complex operator-(complex a);
	complex operator+(double r);
	complex operator-(double r);
private:
	double real;
	double img;


};
complex::complex()
{
	real=0;
	img=0;
}
complex::complex(complex &a)
{
	real=a.real;
	img=a.img;
}
complex::complex(double r , double i)
{
	real=r;
	img=i;
}
void complex::display()
{
	cout<<real<<(img>=0?"+":"")<<img<<"i"<<endl;
}
void complex::operator=(complex a)
{
	real=a.real;
	img=a.img;
}
complex complex::operator+(complex a)
{
	complex temp(real+a.real,img+a.img);
	return temp;
}
complex complex::operator+(double r)
{
	complex temp(real+r,img);
	return temp;
}
complex complex::operator-(complex a)
{
	complex temp(real-a.real,img-a.img);
	return temp;
}
complex complex::operator-(double r)
{
	complex temp(real-r,img);
	return temp;
}
void main()
{
	int m;
	complex a(3,4);
	complex b(4,5);
	complex t;
	t=a+b;
	t.display();
	t=b-a;
	t.display();
scanf("%d",&m);
}