怎么编写c++的类

Question

c++建立一个类后怎么写额

Answer 1

#include "iostream.h"
class size
{
public:
double x;
double y;
size();
};
size::size()
{
cout<<"Input x:";
cin>>x;
cout<<"Input y:";
cin>>y;
cout<<x*y<<endl;
}
int main()
{
size s;
return 0;
}