complex++--.cpp

这是用c++实现的一个复数重载的实例

#include<iostream.h>
#include<math.h>
class Complex
{
	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);
    friend ostream &operator<<(ostream & dest,Complex source);
public:
	Complex(double=0,double=0);
	//Complex(){}
	void display();
	Complex& operator+=(Complex a);
    Complex& operator-=(Complex a);
    Complex& operator++();
	Complex operator++(int);
    Complex& operator--();
	Complex operator--(int);
    Complex& operator=(const Complex c1);
private:
	double real;
	double image;
};



Complex::Complex(double r1,double im)
{
	real=r1;
	image=im;
}
Complex operator+(Complex c1,Complex c2)
{
	return Complex(c1.real+c2.real,c1.image+c2.image);
}
Complex operator-(Complex c1,Complex c2)
{
	return Complex(c1.real-c2.real,c1.image-c2.image);
}
Complex operator*(Complex c1,Complex c2)
{
	return Complex(c1.real*c2.real-c1.image*c2.image,c1.real*c2.image+c1.image*c2.real);
}
Complex operator/(Complex c1,Complex c2)
{
	Complex temp ;
	double c;
	c=c2.real*c2.real+c2.image*c2.image;
	c2.image=-c2.image;
	temp=c1*c2;
	temp.real/=c;
    temp.image/=c;
	return temp;
}

inline Complex & Complex::operator+=(Complex a)
{
	*this=*this+a;
   return *this;
}

inline Complex & Complex::operator-=(Complex a)
{
	*this=*this-a;
    return *this;
}

ostream &operator<<(ostream & dest,Complex source)
{
	char sign='+';
	if(source.image<0)
		sign='-';
	dest<<" "<<source.real<<sign<<fabs(source.image)<<"i";
		dest<<endl;
	return dest;
}

Complex &Complex::operator++()
{
	real++;
	image++;
	return *this;
}
Complex Complex::operator++(int)
{
	Complex temp=*this;
	real++;
	image++;
	return temp;
}
Complex &Complex::operator--()
{
	real--;
	image--;
	return *this;
}
Complex Complex::operator--(int)
{
	Complex temp=*this;
	real--;
	image--;
	return temp;
}

Complex& Complex::operator=( const Complex c1)
{
	if(this==&c1)
		return *this;
	else 
		this->real=c1.real;
	    this->image=c1.image;
	return *this;

}


void Complex::display()
{
	char sign='+';
	if(image<0)
		sign='-';
	cout<<real<<sign<<fabs(image)<<"i";
}
void main()
{
	double x,y,x1,y1;
	double x2,y2,x3,y3;
	cout<<"输入四个复数的实部和虚部"<<endl;
	cin>>x>>y>>x1>>y1>>x2>>y2>>x3>>y3;
	Complex a(x,y),b(x1,y1),c,d,e,f;
	Complex g(x2,y2),h(x3,y3);
	Complex i,j,k,l,m;
	cout<<"\nThe first complex a number is  ";
    cout<<a<<endl;
	cout<<"\nThe second complex b number is  ";
	cout<<b<<endl;
	cout<<"\nThe third complex g number is  ";
	cout<<g<<endl;
	cout<<"\nThe forth complex h number is  ";
	cout<<h<<endl;;
	c=a+b;
    cout<<"\nThe sum is ";
	cout<<c<<endl;
	d=a-b;
    cout<<"\nThe sub is ";
	cout<<d<<endl;
	e=a*b;
    cout<<"\nThe mul is ";
    cout<<e<<endl;
    f=a/b;
    cout<<"\nThe div is ";
    cout<<f<<endl;
	g+=2;
	cout<<"\nThe g+=a is";
	cout<<g<<endl;
	h-=2;
    cout<<"\nThe h-=a is";
	cout<<h<<endl;
    i=g++;
    cout<<"\nThe g++ is";
	cout<<i<<endl;
	j=++g;
    cout<<"\nThe ++g is";
	cout<<j<<endl;
	k=h--;
    cout<<"\nThe h-- is";
	cout<<k<<endl;
	l=--h;
    cout<<"\nThe --h is";
	cout<<l<<endl;
	m=a;
	cout<<"\nThe m=a is";
	cout<<m<<endl;
	}