Implementation of strings basic operation String String( const String ob)t 复制构造函数:从已有串ob复制 ch= new charImaxLen+11;创刨建串数组 if ch==NULL cer<<“存储分配错!Ⅷm”; exit(1); curlen= ob. curlen;1复制串长度 Cpy(ch,obch);/复制串值 stiString :: String ( const String& ob ) { //复制构造函数：从已有串ob复制 ch = new char[maxLen+1]; //创建串数组 if ( ch == NULL ) { cerr << “存储分配错! \n”; exit(1); } curLen = ob.curLen; //复制串长度 strcpy ( ch, ob.ch ); //复制串值 } Implementation of string’s basic operation