#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
using namespace std;

class Sir
{
protected:
    char* s;


public:
    Sir();
    Sir(char* nume);
    ~Sir();
    void Afisare();
    Sir operator+=(Sir& td);
    Sir& operator=( Sir& td);






};
Sir::Sir()
{
    s = NULL;
}
Sir::Sir(char* s_nou)
{
        s = new char[strlen(s_nou) + 1];
        strcpy(s, s_nou);
}
Sir::~Sir()
{
     /*  if(s)
      {
       delete [] s;
      }*/
}
void Sir::Afisare()
{
    cout << s << endl;
    cout << endl;
}

Sir Sir::operator+=(Sir& td)
{
    Sir rez;

    rez.s = new char[strlen(s)+strlen(td.s) + 1];
    strcpy(rez.s,s);
    strcat(rez.s,td.s);


    delete []s;
    s=new char[strlen(rez.s)+1];
    strcpy(s,rez.s);

    return s;


}
Sir& Sir::operator=(Sir& td)
{

    if (this == &td)
        return *this;
    else
    {
        if (s)
        {
            delete[]s;
        }
        if (td.s)
        {
            s = new char[strlen(td.s) + 1];
            strcpy(s, td.s);
        }

        return *this;
    }
}





 class SirNr :public Sir
 {
 public:
     SirNr():Sir(){}
     SirNr(char* nume):Sir(nume)
     {
         Numere(s);
     }
     SirNr& operator+=(SirNr& td)
     {

          Sir::operator+=(td);
         return *this;


     }
     SirNr& operator=(SirNr& td)
     {
         Sir::operator=(td);
         return *this;
     }

     void Numere(char *(&nr))
     {
         char *rez;
         int a=0,b=0;
         for(int i=0;i<strlen(nr);i++)
         {
             if(int(nr[i])>=48 && int(nr[i])<=57)
                 a++;
         }
         rez=new char[a+1];
         for(int i=0;i<strlen(nr);i++)
         {
             if(int(nr[i])>=48 && int(nr[i])<=57)
             {
                 rez[b]=nr[i];
                 b++;
             }
         }
         rez[a]=NULL;
         nr=new char[a+1];
         strcpy(nr,rez);
         delete[] rez;

     }
 };



int main()
{

    SirNr A("masina22"),B("me1312"),C;
    A.Afisare();
    B.Afisare();
    A+=B;
    A.Afisare();

    system("pause");
    return 0;
}