Класс "Графический объект", от которого будут наследоваться классы "круг" и "квадрат"

#include <iostream> 
#include <string.h> 
using namespace std;
 
class graph 
{
public: 
    graph (char* , int);
    void sh_form (void);
private:
    char *form;
int s;};
graph::graph (char *form, int s)
{ 
    strcpy(graph::form, form);
    graph::s = s;
} 
void graph::sh_form(void) 
{ 
    cout << "forma:" << form << endl;
    cout << "ploshad' : " << s <<endl;
} 
 
class krug: public graph
{public: 
krug (char *, int, int);
void sh_krug (void);
private:
    int r;  
};
krug::krug (char *form, int s, int r) :graph (form, s)
{
    krug:r = r;
}
void krug::sh_krug (void)
{sh_form ();
cout <<"radius:"<<r <<endl;
}
 
 
void main (void)
{graph fig("Krug", 36);
krug kr("Krug", 36, 6);
fig.sh_form();
kr.sh_form ();
}

strcpy(graph::form, form);

char *strcpy(graph::form);

#include <iostream> 
#include <string.h> 
using namespace std;
 
class graph 
{
public: 
    graph (char* , int);
    void sh_form (void);
    ~graph()
    {
        delete [] form;
    }
private:
    char *form;
    int s;
};
 
graph::graph (char *form, int s)
{ 
    this ->form = new char[strlen(form) + 1];
    strcpy(this ->form, form);
    this ->s = s;
} 
 
void graph::sh_form(void) 
{ 
    cout << "forma:" << form << endl;
    cout << "ploshad' : " << s <<endl;
} 
 
class krug: public graph
{
    public: 
        krug (char *, int, int);
        void sh_krug (void);
        private:
            int r;  
};
 
krug::krug (char *form, int s, int r) : graph (form, s)
{
    this ->r = r;
}
 
void krug::sh_krug (void)
{
    sh_form ();
    cout <<"radius:"<< r <<endl;
}
 
 
int main (void)
{
    graph fig("Krug", 36);
    krug kr("Krug", 36, 6);
    fig.sh_form();
    kr.sh_krug ();
}

 ~graph()
    {
        delete [] form;
    }