void MyString:: addingSign(const char* _sign) {
    char* newString = new char[strlen(myStr) + strlen(_sign) + 1];
    //this->myStr = new char[strlen(newString) + 1];
    //char* save;
    //save = newString;

//  char* newSave = new char[strlen(newString) + strlen(_sign) + 1];
    //strcpy(newSave, save);
    //delete[]save;  // nz kvo sum pravila tuka kudeto da komentarite sorry

    int i_result = 0;
    for (int i = 0; myStr[i] != '\0'; i++, i_result++) {
        newString[i_result] = myStr[i];
    }
    for (int i = 0; _sign[i] != '\0'; i++, i_result++) {
        newString[i_result] = _sign[i];
    }

    newString[i_result] = '\0';
    setMyString(newString);
    delete[] newString;



}