reading in files

This is a discussion on reading in files within the C++ Programming forums, part of the General Programming Boards category; I know how to read in files and how to avoid spaces. But how do you only get the program ...

  1. #1
    Frustrated Programmer :( phantom's Avatar
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    Question reading in files

    I know how to read in files and how to avoid spaces. But how do you only get the program to read in values that appear only AFTER a 'return' in a normal .txt file, i.e if the first value isn't right then ignore the rest of the line.

    james
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  2. #2
    Used Registerer jdinger's Avatar
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    Re: reading in files

    Originally posted by phantom
    I know how to read in files and how to avoid spaces. But how do you only get the program to read in values that appear only AFTER a 'return' in a normal .txt file, i.e if the first value isn't right then ignore the rest of the line.

    james
    Use some form of check to validate the data read in. Use "getline" to read in the entire line. Then check the first portion with strcmp to see if it matches your pre-defined value to ignore, if so, go on to the next line, if not, process the data in.

  3. #3
    Registered User
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    You could also try something like this:

    #include <ctype.h>

    ifstream file;

    while (isalnum(file.peek()) {

    // Read in data ...
    // blah blah blah

    it uses the "is alapha numeric"

    good luck
    Skeptic

  4. #4
    Frustrated Programmer :( phantom's Avatar
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    Cheers all

    Thanks for the responses, I'll get right onto it today
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