'c++ struct' can have private_members and function also

//A Simple program to show c++ structure can have function
// using c++, GCC complier
 
#include <iostream>
using namespace std;

struct CRectangle       //here we define a user-defined-datatype using 'struct'
{
    private:
        int x, y;

    public:
        void set_values (int,int);

        int area()
        {
            return (x*y);
        }
};

void CRectangle :: set_values (int a, int b)
{
    x = a;
    y = b;
}

int main()
{
    CRectangle rect;    //creating the object (rect) of a class (CRectangle)

    rect.set_values (3,4);
    cout << "area:" << rect.area();
   
    cin.ignore();
    cin.get();
}
______________________________________________________________
also see the same program using class (only difference, we use 'class' instead of 'struct')