using namespace std;
class figure
{
public:
figure(double x,double y,double z):a(x),b(y),c(z){}
double area()
{
return a*b;
}
double size()
{
return a*b*c;
}
private:
double a,b,c;
};
int main()
{
figure f1(1.1,2.1,3.1);
cout<<"面積為："<<f1.area()<<endl;
cout<<"體積為："<<f1.size()<<endl;
}