String Simple implementation

Namespace ss{class String {friend ostream& operator << (ostream&, const string&);    Char *_str;        Public:string (): _str (new char[1]) {_str[0] = ' + ';        } string (const char* str): _str (new Char[strlen (str) +1]) {strcpy (_str, str);        } string (const string & S): _str (New Char[s.size () +1]) {strcpy (_str, S._STR);        } string (string&& s): _str (s._str) {s._str = nullptr;            }//operator String & operator = (string s) {swap (s);        return *this;        } char & operator [] (int i) {return _str[i];}         /* String &operator = (Const string &s) {if (this = &s) {delete []_str;         if (s._str!= nullptr) {_str = new Char[strlen (S._STR) +1];         strcpy (_str, S._STR);         }} return *this;       }*///get size_t size () const {     return strlen (_STR);        }//Void swap (string& s) {Std::swap (_str, S._STR);    }    };        ostream& operator << (ostream& os, const string &ob) {OS << ob._str;    return OS; }    };

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String Simple implementation