C + + "String class" string deletes a single character, removing the function implementation of a string

#include <iostream> #include <stdlib.h> #include <assert.h>using namespace std;class  string{public:    string (CONST&NBSP;CHAR*&NBSP;STR)       &NBSP;&NBSP;&NBSP;:_STR (New char[strlen (str)  + 1])     {         _size = strlen (str);         _ capacity = _size + 1;        strcpy (_str, str );     }    string (const string& s)          :_str (NULL)     {         string tmp (S._STR);         swap (_STR,&NBSP;TMP._STR);     }    ~string ()     {         if  (_STR)         {             delete[] _str;            _ size = 0;            _capacity =  0;            _str = NULL;         }    }         //Delete a single character     /*void erase (Size_t pos)     {         assert (pos <=_size);   //pos>_size error          int begin = pos;         while  (begin <= _size)         {             _str[begin] = _str[begin + 1];             begin++;        }         --_size;    }*/    // Delete String     void erase (Size_t pos, int len)     {         assert (pos <= _size);             int len1 = len + 1;         while  (len1--)         {             _str[pos] = _str[pos + len  +1];            pos++;         }        _size = _size - len;    }         char* c_str ()     {         return _str;    }    private:     char* _str;    int _size;    int _ capacity;}; Void test () {    string s ("Abcdefghijk");     s.erase (2,4);     cout << s.c_str ()  << endl;} Int main () {    test ();     system ("Pause");     return 0;}

C + + "String class" string deletes a single character, removing the function implementation of a string