using namespace std;
#include<iostream>
#include<math.h>
#include<stdio.h>
#include<conio.h>
class hinhchunhat
{
	private:
		float cd,cr;
	public:
		void nhap()
		{
			cout<<"nhap chieu dai:";
			cin>>cd;
			cout<<"nhap chieu rong:";
			cin>>cr;
		}
		void xuat()
		{
		cout<<"chieu dai la:"<<cd<<endl;
		cout<<"chieu rong la:"<<cr<<endl;
	    }
	  int chuvi()
	    {
	    	float cv;
	    	cv=(cd+cr)*2;
	    	return cv;
	    }
	    int dientich()
	    {
	    	float dt;
	    	dt=cd*cr;
	    	return dt;
	    }
};
main()
{
	hinhchunhat hcn;
	hcn.nhap();
	hcn.xuat();
	cout<<"\ndien tich hcn la:"<<hcn.dientich();
	cout<<"\nchu vi hcn la:"<<hcn.chuvi();
	getch();
}