I created a driver for a widget and it runs perfectly, but I traslate it to Qt it does not work.
Here is the driver program:
Qt Code: 
  1. void rule(int digit,int x, int place[])
  2. {
  3.  
  4.    int n,flag=0;
  5.    if(x % 2>0)
  6.      n=floor(x/2);
  7.    else
  8.     n=x/2;
  9.  
  10.    for(int i=0;i<n;++i)
  11.    if (place[i]==place[n-i])
  12.        flag++;
  13.   if (flag==n)
  14.    std::cout <<"  "<<digit<<" is a palindrome";
  15.   else
  16.      std::cout<<"  " <<digit<<" is not  a palindrome";
  17.  
  18.  
  19.  
  20. }
  21.  
  22.  
  23. int pow(int a ,int b)
  24. {
  25.   int i=1,power=1;
  26.    while(i<b)
  27.   {
  28.      power *=a;
  29.      ++i;
  30.  
  31.  }
  32.     return power;
  33.  
  34.  
  35. }
  36.  
  37.  
  38. int main()
  39. {
  40.  
  41.       int rem[10],digit,n,x=1,place[10];
  42.       std::cout << "\nEnter  another number  :";
  43.       std::cin>>digit;
  44.       n= sizeof digit;
  45.       std::cout<<"\nn= "<< n;
  46.       rem[0]= digit % pow(10,n);
  47.       place[0]= (digit-rem[0])/pow(10,n);
  48.         while( x<n)
  49.         {
  50.          rem[x]=rem[x-1] % pow(10,n-x);
  51.          place[x]=(rem[x-1]-rem[x])/pow(10,n-x);
  52.  
  53.          x++;
  54.      }
  55.           rule(digit,x,place);
  56.  
  57.       system("Pause");
  58.  
  59.     }
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When run it Qt any number typed in states it is not a palindrome, but in the driver it worls
Here is the Qt version

Qt Code: 
  1. #include "ui_palindrome.h"
  2. #include "palindrome.h"
  3. #include <QString>
  4. #include <QtGui>
  5. #include <QLineEdit>
  6. #include <QPushButton>
  7. #include <QSize>
  8.  
  9.  
  10. void rule(int x, int place[],QLineEdit *lineEdit)
  11. {
  12.     QString msg=lineEdit->text()+" is a palindrome";
  13.     QString msg2=lineEdit->text()+" is not  a palindrome";
  14.     QMessageBox msgbox;
  15.     int n,flag=0;
  16.  
  17.    if(x % 2>0)
  18.      n=floor(x/2);
  19.    else
  20.     n=x/2;
  21.  
  22.  
  23.    for(int i=0;i<n;++i)
  24.    if (place[i]==place[n-i])
  25.        flag++;
  26.   if (flag==n)
  27.  
  28.       msgbox.setText(msg);
  29.     else
  30.       msgbox.setText(msg2);
  31.  
  32.       msgbox.exec();
  33.  
  34. }
  35.  
  36.  
  37.  
  38.  
  39.  
  40. int pow(int a ,int b)
  41. {
  42.   int i=1,power=1;
  43.  while(i<b)
  44.   {
  45.      power *=a;
  46.      ++i;
  47.  }
  48.  return power;
  49.  
  50.  }
  51.  
  52.  
  53.  
  54. palindrome::palindrome(QWidget *parent) :
  55.     QDialog(parent)
  56.  
  57. {
  58.    setupUi(this);
  59. connect(checkButton, SIGNAL(clicked(bool)), this, SLOT(palindrome_checker()));
  60. }
  61.  
  62.  
  63. palindrome::~palindrome()
  64. {
  65.     delete this;
  66. }
  67.  
  68.  
  69.  
  70. void  palindrome::palindrome_checker()
  71. {
  72.     int remainder[10],place[10],digit,x=1,m=0;
  73.  
  74.     digit=lineEdit->text().toInt();
  75.     m=lineEdit->text().size();
  76.     remainder[0]= digit % pow(10,m);
  77.     place[0]= (digit-remainder[0])/pow(10,m);
  78.      m=lineEdit->text().size();
  79.       while(x<m)
  80.       {
  81.        remainder[x]=remainder[x-1] % pow(10,m-x);
  82.        place[x]=(remainder[x-1]-remainder[x])/pow(10,m-x);
  83.       ++x;
  84.      }
  85.  
  86.    rule(x, place,lineEdit );
  87.  
  88. }
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I posted problems with this widge & I thought I was, as far interface goes it reacts when a number is put in.
I think the problem might be
Qt Code: 
  1. m=lineEdit->text().size();
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but according to the documentation size() returns the size() of lineEdit->text() as an int.
Help !