Question

Error I can't figure out

Asked by: charles_kline

Here is the error I am getting on this bit of code:

Error   : pointer/array required
palindrome.cpp line 35   if(my_str[index_a] != my_str[index_b])


Here is the .cpp stuff:

#include <iostream.h>
#include "boolean.h"
//#include <string.h>
#include "strlib.h"

boolean flip_str(myString my_str);

int main( void )
{
      myString pal;
      
      cout << "Please type in a string: \n";
      cin >> pal;
                   
      if (flip_str(pal) == (TRUE)){
      cout << "The word " << pal << " is a palindrome" << endl;
      }
      else{
            cout << "The word " << pal << " is not a palindrome" << endl;
      }
      
}


boolean flip_str(myString my_str)
{
      int index_a = 0;
      int index_b = my_str.length() - 1;
      
      while (index_a < index_b) {
            if(my_str[index_a] != my_str[index_b])
                  return FALSE;
            index_a++;
            index_b--;
      }
      return TRUE;
}

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Asked On
1997-12-11 at 11:11:10ID10032397
Topic

General Macintosh Programming

Participating Experts
1
Points
100
Comments
2

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Answers

 

by: charles_klinePosted on 1997-12-11 at 11:12:11ID: 1291717

Edited text of question

 

by: twallPosted on 1997-12-12 at 13:44:59ID: 1291718

The error means that the type of the variable you are applying the index or "[]" operator to is not a pointer, an array, or a class for which operator[] is defined.

You don't show the definition of the "myString" class, which is the type of the argument "my_str" in "flip_str".  Is this really the data type/class you want?

If you chagne the type of my_str from myString to a standard String, you'll have an implementation of operator[] which allows the string contents to be indexed.

20120131-EE-VQP-002

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