#include <iostream>
#include <stdio.h>
#include <conio.h>

using namespace std;

class figura1

{
private:
float a;
float b;
public:
figura(float aa,float bb);
virtual float area();
virtual void output();
};

figura1::figura(float aa,float bb)
{
a=aa;
b=bb;
}
float area(float S,float a,float b)
{
return S=a*b;
}
void output(float S)
{
cout«"S";
}


int mine()
{
float a;
float b;
cout«" a ";
cin» a;
cout«"b";
cin»b;
cout« "S";
getch();
}