#include <iostream>
#include <iomanip.h>
#include <conio.h>
using namespace std;

class SP1
{
	protected:
		float a,b;
	public:
		SP1(float da=0, float db=0)
		{
			a=da;
			b=db;
		}	
		~SP1()
		{
			
		}
		void Nhap()
		{
			cout<<"Nhap phan thuc: ";cin>>a;
			cout<<"Nhap phan ao: ";cin>>b;
		}
		void Xuat()
		{
			cout<<a;
			if(b>=0)
				cout<<"+"<<b<<"j";
			else
				cout<<b<<"j";				
		}
		SP1 tinhtong(SP1 &sp)
		{
			SP1 tong;
			tong.a=sp.a+a;			
			tong.b=sp.b+b;
			return tong;
		}
};
class SP2:public SP1
{
	public:
		friend istream& operator>>(istream &is, SP2 &sp)
		{
			cout<<"Nhap phan thuc: ";is>>sp.a;
			cout<<"Nhap phan ao: ";is>>sp.b;
			return is;
		}
		friend ostream& operator<<(ostream &os, SP2 sp)
		{
			os<<sp.a;
			if(sp.b>=0)
				os<<"+"<<sp.b<<"j";
			else
				os<<sp.b<<"j";
			return os;	
		}
		SP2 tinhhieu(SP2 &sp)
		{
			SP2 hieu;
			hieu.a=-sp.a+a;			
			hieu.b=-sp.b+b;
			return hieu;
		}
		SP2 tinhtich(SP2 &sp)
		{
			SP2 tich;
			tich.a=sp.a*a-sp.b*b;			
			tich.b=sp.b*a+sp.a*b;
			return tich;
		}
};

int main()
{
	SP2 sp1,sp2,tich,hieu;
	cout<<"Nhap so phuc thu 1\n\n";cin>>sp1;
	cout<<"\n\nNhap so phuc thu 2\n\n";cin>>sp2;
	hieu = sp1.tinhhieu(sp2);
	tich = sp1.tinhtich(sp2);
	cout<<"\n\nHieu 2 so phuc la: ";
	cout<<hieu;
	cout<<"\n\nTich 2 so phuc la: ";
	cout<<tich;
	cout<<"\n\n\n";
	return 0;
}