C++作业3

//4-11

#include<iostream>
using namespace std;
class Rectangle{
    public:                              
        Rectangle(double L=1,double W=1);         

        Rectangle(Rectangle &r);           
                        
        ~Rectangle(){};                                          
        void show(double L,double W);
        
    private:                                     
        double length;                
        double width;
}; 

Rectangle::Rectangle(double L,double W){            
    length=L;
    width=W;
}

Rectangle::Rectangle(Rectangle &r){
    length = r.length;
    width = r.width;
}

void Rectangle::show(double L,double W)
{   length=L;
    width=W;
    cout<<"length:"<<length<<endl;
    cout<<"width:"<<width<<endl;
    cout<< "area:"<<length*width<<endl;
    
}

int main(){
    
    double length,width;
    cin>>length>>width;
    Rectangle area(length,width);
    area.show(length,width);
    return 0; 
}

#include<iostream> 
using namespace std;
class Complex
{
    public:
    Complex(double r0=0,double i0=0);
    void add(Complex &c0);
    void show()
    {
        cout<<"complex:"<<Real<<"+"<<imaginary<<"i"<<endl;
    }
    
    private:
        double Real;
        double imaginary; 
    
    
    
};
Complex::Complex(double r0,double i0)
{
    Real=r0;
    imaginary=i0;
}

void Complex::add(Complex &c0)
{
    Real+=c0.Real;
    imaginary+=c0.imaginary;
}
int main()
{
    Complex c1(3,5);
    Complex c2=4.5;
    c1.show();
    c2.show();
    c1.add(c2);
    cout<<"additon:"<<endl;
    c1.show();
    return 0;
}