RE: [Dev-C++] String Functions

[Schedler, K. <Kur...@hi...>]

bool String::deleteChars (int beg, int end)
{
 
   // do range checking on arguments
   ...
 
   // assuming a null terminated string...
   // overwrite the characters from beg onward 
   // with the characters from end onward
   while ( sequence[end] != '\0' )
   {
      sequence[beg] = sequence[end];
      beg++;
      end++;
   }
 
   sequence[beg] = '\0';
 
   current_length = beg;
 
   return true;
}

 
 
   

-----Original Message-----
From: Linda Hohenstein [mailto:lz...@sp...]
Sent: Tuesday, May 01, 2001 1:28 PM
To: Tutoraid; C++ List
Subject: [Dev-C++] String Functions


Hi All,
 
Can anyone help me with a couple of functions I am having problems with in
the String class I am writing?  (It runs.)
 
The following code is supposed to return the first instance of a character,
but is returning the last (11):
 
int String::firstcharfind (const char& charfind) const  //#2
{  size_t i;
   int position;
   for (i = 0; i < current_length; i++)
   {
      if (sequence[i] == charfind)
         position = i;
   }
   return position;
}
 
This is called by: 
 
//#2
   char testing [28] = "Delete the extra word word.";
   String demostring (testing);
   cout << demostring.firstcharfind ('e') << endl;
 
The second function is supposed to delete one of the "word"s in the above
function:
 
bool String::charsdelete (int begin, int end)  //#4
{
   int i;
   if ((begin < 0) || (end > current_length) || (begin > end))
      return false;
   int partdeleted = (end - begin) + 1;
   for (i = begin; i <= current_length - partdeleted ; i++)
   {
      sequence[i] = sequence[partdeleted + 1];
   }
   current_length = current_length - partdeleted;
   allocated = allocated - partdeleted;
   return true;
}

It's called by:
 
//#4 <file://#4> 
   demostring.charsdelete (18, 22);
   cout << demostring << endl;
 
The output is:
 
Delete the extra w      ord.
 
I'd appreciate any help anyone can give - it's the last class for my Data
Structures class.
 
TIA,
 
Linda
 
 




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