using file iostream....

This is a discussion on using file iostream.... within the C++ Programming forums, part of the General Programming Boards category; okay, here's my main...messy, I know, I've tried so much stuff to get it to run: Code: void main() { ...

  1. #1
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    using file iostream....

    okay, here's my main...messy, I know, I've tried so much stuff to get it to run:

    Code:
    void main()
    {
        int i = 0;
        ifstream fin("EmailTest.txt");
        char s[300];
        char* str = s;
        MyString String(str);
    
    
        while( !fin.eof )
        {
            fin >> str;
    
            cout << str;
                
            Email anEmail( str );
    
    	        if( anEmail.IsValid() )
    	    	    cout << 1 << endl;
    	        else
    	    	    cout << 0 << endl;
          
    
        }
    }

    Here's what it needs to do: In your main() make a loop that would read file stream with email addresses and output file stream with 0 or 1 strings one per line.


    I have tried so much stuff, and I can't get it to work. I have no idea how to do it...especially since it's a custom string class...

    EDIT: I know the file output isn't there...I'm trying to get the input to work first...
    Last edited by Saggio; 10-05-2006 at 01:46 AM.

  2. #2
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    Hello there. It makes things a little less clear when you post some code, but give no clue as to your errors and there are a lot of people on these boards that will go berserk and curse you out about it. Anyways here is a brief program that will retrieve emails from a file, which is basically the same as your code:

    Code:
    #include <fstream>  // This is required for file streams.
    #include <iostream> // This is required for input/output streams. (ie cout)
    
    int main()
    {
      std::ifstream emailFile("Emails.txt"); // Open a file for inputing.
      char s[300];
      char* str = s; // A little redundant considering the above line is sufficient for storing input from a file, but will work nontheless.
      
      while(!emailFile.eof())  // Notice eof is a function
      {
        emailFile >> str;  // Read a line from the file.
        std::cout << str << std::endl;  // Output the line just read to the screen.
      } 
      
      emailFile.close();   // All done so close the file.
      
      return 0;
    }
    Hopefully the above is enough to get you on your way. Output to a file is rather similar to input, but instead of an ifstream you use ofstream.
    Last edited by Kurisu33; 10-05-2006 at 03:47 AM.

  3. #3
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    Sorry about that, the problem is that it does not seem to be getting the input from the file correctly. It doesn't work with the code you posted, either.


    EDIT: Oh wow, the whole problem was that it was named EmailTest.txt.txt....damn Windows for hiding extensions! haha

    hours of aggrivation for THAT.

    thanks.
    Last edited by Saggio; 10-05-2006 at 07:38 AM.

  4. #4
    Cat without Hat CornedBee's Avatar
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    Now is the time to disable extension hiding. It's one of the stupidest "features" of Windows anyway.
    All the buzzt!
    CornedBee

    "There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
    - Flon's Law

  5. #5
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    Yeah, I usually turn it off, but I just installed the windows vista beta last week, looks like I forgot

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