Palindrome program

[Freshpots]

What is messing with me is that when equal is set to false one it is not rest to true again.

#include <iostream>
#include <fstream>
#include <string>

#include "Queue.h"
#include "Stack.h"

using namespace std;

int main()
{
        Queue q;  Stack s;
        string line;


        int length = 0;
        bool equal = true;

        ifstream file;
        file.open("input.txt");

        while(!file.eof())
        {
		
                getline(file,line);
                length =line.length();

                for(int i =0; i<length;i++)
                        line[i] = tolower(line[i]);
                for(int i =0; i<length; i++)
                {
			
                        if(isalpha(line[i]) || isalnum(line[i]))
                        {
                                //cout<<line[i]<<" ";
                                q.enqueue(line[i]);//add item to back of queue
                                s.push(line[i]);//add character to top of stack
                        }
                }
                //cout<<endl<<"***NEW LOOP***"<<endl;
                while(q.empty() !=true)
                {
                        //cout<<q.front()<<"   "<<s.top()<<endl;
                        equal = true;
                        if(q.front() != s.top())
                        {
                                equal = false;
                                break;
                        }
                        q.dequeue();//removes first value from queue
                        s.pop();//removes top value from stack
                }
                if(equal == true)
                        cout<<"This is a palindrome"<<endl;
                else if(equal == false)
                {
                        cout<<"This is not a palindrome"<<endl;
                        equal=true;
                }
        };
        file.close();
        return 0;
}

[MikeyBoy]

What is messing with me is that your code is hard to read, because you didn't use code tags:

http://www.cplusplus.com/articles/z13hAqkS/

[Freshpots]

Alright sorry about that didn't know about that.

[cire]

What is messing with me is that when equal is set to false one it is not rest to true again.

What makes you believe that is what is happening?

[Freshpots]

What is happening is when it loops through the file, once it hits a line that would return false it will say the rest are false so(we are only looking at numbers and letters by the way):

Go hang a salami. I'm a lasagna hog. Is a palindrome
Cigar? Toss it in a can, it is so tragic. Is a palindrome
Dog as a devil deified lived as a god. Is a palindrome
(Thanks to Jason Hanson) Is not a palindrome
Stressed? No tips ? Spit on desserts. Is not a palindrome
(Thanks to Cbmac62) Is not a palindrome
No, Sir! Away! A papaya war is on! Is not a palindrome
(Thanks to Kathy) Is not a palindrome

And so on for the rest of the file

[cire]

That is not because of the value equal takes on. That's because you abort checking through your queue and stack when it's apparent the string is not a palindrome, and don't empty them so that on the next iteration of the loop they still have unprocessed stuff in them from the last iteration.

[Freshpots]

Alright thanks a lot man.