While loop

[Aseel]

Hi Programmers,

I'm writing a program to read text file and display it on the screen but it just works for the first time and if I tried again it doesn't display anything!
This is the code:

#include <iostream>
#include <fstream>
#include <string>
#include <cstdlib>
using namespace std;

 ofstream outDictFile( "Dict.dat", ios::app );
 ifstream inDictFile( "Dict.dat", ios::in );
 
 int main()
{
 char cont;
 string line;

 do
 {
  while( getline( inDictFile, line ))
      cout << " " << line << endl;

  cout << "\nPress \"y\" to continue or any key to exit... "; cin >> cont;

 } while (cont == 'Y' || cont == 'y');
}

What's going wrong?

[DrakeMagi]

this might work after do.

inDictFile.clear(); // clear the eof
inDictFile.seekg(0); // set get pointer to the beginning 

[Aseel]

Yeaaah it works :), can you explain further what did these two lines do with my code? I mean what happen before and after adding them.

[DrakeMagi]

http://www.cplusplus.com/doc/tutorial/files/
1. once you hit the end of file(eof) it trip a flag.
this flag must be reset.
.clear()

2. your get pointer was at the end.
the get pointer is where it start reading data.
File > this is the pointer for my example
each dot stands for a number or character.

 . . .
 . . . . . . 
 . . . . 
 . . . . . . . 
 . .>

.seekg(0)

>. . .
 . . . . . . 
 . . . . 
 . . . . . . . 
 . .