友元.cpp

c++算法的很经典的一些小练习 看了 觉得还可以 给大家分享一下！

#include<iostream.h>
#include<math.h>

class Complex{
	double Real,Image;
public:
	Complex(double r=0.0,double i=0.0):Real(r),Image(i){}//注意：必须对和进行初始化。
    Complex(Complex &com){
		Real=com.Real;
		Image=com.Image;
	}

void Print(){
	cout<<"Real="<<Real<<'\t'<<"Image="<<Image<<'\n';
}
friend Complex operator+(const Complex&,const Complex&);
void operator+=(Complex);
double abs(void);
friend Complex operator/(const Complex&,const Complex&);
friend Complex operator*(const Complex&,const Complex&);
};
Complex operator+(const Complex&c1,const Complex&c2){ 
	return Complex (c1.Real+c2.Real,c1.Image+c2.Image);
}
void Complex:: operator+=(Complex c){
	Real=Real+c.Real;
	Image+=c.Image;
}
double Complex:: abs(void){
	return sqrt(Real*Real+Image*Image);
}
Complex operator/(const Complex&c1,const Complex&c2){
	double d=c2.Real*c2.Real+c2.Image*c2.Image;
	return Complex((c1.Real*c2.Real+c1.Image*c2.Image)/d,(c1.Image*c2.Real-c1.Real*c2.Image)/d);
}
Complex operator*(const Complex&c1,const Complex&c2){
	return Complex(c1.Real*c2.Real-c1.Image*c2.Image,c2.Image*c1.Real+c2.Real*c1.Image);
}
void main(){
	Complex c1(1.0,1.0),c2(2.0,2.0),c3(4.0,4.0),c;
	double d=0.5;
	c1.Print();
	c=c2+c3;
	c.Print();
	c+=c1;
	c.Print();
    c=c+d;
	c.Print();
	c=c3*c2;
	c.Print();
	c=c3/c1;
	c.Print();
	c=c3*d;
	c.Print();
	c=c3/d;
	c.Print();
	cout<<"c3的模是:"<<c3.abs()<<endl;
}