c++实验三

1.
using namespace std;
class Rectangle{
    public:
        void set(double l,double w);
        void show();
    private:
        double L,W;
};
//成员函数的具体体现
void Rectangle::set(double l,double w){
    L=l;
    W=w;
}
inline void Rectangle::show(){
    cout<<"矩形长为"<<L<<"宽为"<<W<<"面积为"<<L*W;
}
int main(){
    double x,y;
    cin>>x>>y;
    Rectangle arectangle;
    arectangle.set(x,y);
    arectangle.show();
    return 0;
}

 2.

#include<iostream>
using namespace std;
class Complex{
	public:
		Complex(float x,float y);
		Complex(float x);
		void add(Complex &c);
		void show();
	private:
		float X,Y;
};
Complex::Complex(float x,float y){
	X=x;
	Y=y;
}
Complex::Complex(float x){
	X=x;
}
void Complex::add(Complex &c)
{
    X+=c.X;
    Y+=c.Y;
}
void Complex::show(){
	cout<<X<<"+"<<Y<<"i";
}
int main(){
	Complex c1(3,5);
	Complex c2=4.5;
	c1.add(c2);
	c1.show();
return 0;
}