Implementation of the C + + string data type

1#include <cstdlib>2#include <cstring>3 4 classMystring5 {6  Public:7Mystring (Const Char*pdata)8     {9         if(pdata==NULL)Ten         { Onedata =New Char[1]; A*data =' /'; -         } -         Else the         { -             intLen =strlen (pdata); -data =New Char[len+1]; - strcpy (data,pdata); +         } -     } +Mystring (ConstMystring &str) A     { at         intLen =strlen (str.data); -data =New Char[len+1]; - strcpy (data,str.data); -     } -  -Mystring &operator=(ConstMystring &str) in     { -         if( This!=&str) to         { + Mystring strtemp (str); -             Char*ptemp =Strtemp.data; theStrtemp.data = This-data; *              This->data =ptemp; $         }Panax Notoginseng         return  This; -     } theOstream &operator<< (Ostream &os,ConstMystring &str) +     { Aos<<Str.data; the         returnos; +     } -Mystring &operator+(ConstMystring & str)Const $     { $         if(str.data!=NULL) -         { -             intLen1 =strlen (str.data); the             intLen2 = strlen ( This-data); -Mystring strtemp (* ( This->data));//Create a temporary object to save the original object's dataWuyi             Delete[]data;//Delete the original data theData=NULL; -data =New Char[len1+len2+2];//Opening and closing of new space Wustrcpy (Data,strtemp.data);//Copy -strcat (Data,str.data);//Stitching About         } $         return  This; -     } -  -     Char operator[](intindex) A     { +         intLen =strlen (data); the         if(index>len| | index<0) -         { $Perror ("index is not in the cope!"); theExit0); the}Else the             return*(( This->data) +index); the     } -  in~Mystring () the     { the         Delete[]data; About     } the Private: the     Char*data; the};

Implementation of the C + + string data type