how can i writ in file like test.txt??!

This is a discussion on how can i writ in file like test.txt??! within the C++ Programming forums, part of the General Programming Boards category; I have 2d array (float) having some values , i want my program create a file if it not exist ...

  1. #1
    Registered User
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    Dec 2010
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    how can i writ in file like test.txt??!

    I have 2d array (float) having some values , i want my program create a file if it not exist , and i want to write the values of 2d array (float) in this file , please can any one help me , I am beginner in programming .

  2. #2
    Registered User
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    Nov 2003
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    177
    check this link out:
    Input/Output with files

    Code:
    #include <iostream>
    #include <fstream>
    using namespace std;
    
    int main () {
      ofstream myfile;
      myfile.open ("example.txt");
      myfile << "Writing this to a file.\n";
      myfile.close();
      return 0;
    }
    This code creates a file called example.txt and inserts a sentence into it in the same way we are used to do with cout, but using the file stream myfile instead

  3. #3
    Registered User
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    Quote Originally Posted by ahmed eltaher View Post
    I have 2d array (float) having some values , i want my program create a file if it not exist , and i want to write the values of 2d array (float) in this file , please can any one help me , I am beginner in programming .
    1- you need 2 loops to check the 2 dimention array cells
    2- if the value is not 0 then write it in the file using the instruction in the previous post.


    good luck

  4. #4
    a_capitalist_story
    Join Date
    Dec 2007
    Posts
    2,657
    You're doing matrix multiplication with MPI, and yet you can't figure out how to write to a text file? Dude, your priorities are out of whack here.

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