need help (c/c++)
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Thread: need help (c/c++)

  1. #1
    Member
    Join Date
    Sep 2002
    Posts
    98

    need help (c/c++)

    How can i read some formated data like what is below:
    428 9131 1878 8147
    7716 5775 2118 3488
    1771 2796 2125 2267
    5292 8886 8271 4902
    6428 4837 9460 413
    6002 4064 7462 1077
    9800 7856 3231 1413
    8465 2451 5489 3428
    6283 8174 5063 4372
    8806 5591 2940 8926
    9349 8899 7675 5647
    3861 4284 9671 2002
    and assign each number to an array(a[0][0]-a[12][4]).
    (The gaps between the numbers were made using the backslash character constant \t)

  2. #2
    Senior Member
    Join Date
    Nov 2001
    Posts
    472
    You can assign the data to the array at initialization. I used only the 5 first rows. You should put this code inside your .h-file:

    static int data[5][4]={
    {428, 9131, 1878, 8147} ,
    {7716, 5775, 2118, 3488},
    {1771, 2796, 2125, 2267},
    {5292, 8886, 8271, 4902},
    {6002, 4064, 7462, 1077}
    };
    ---
    proactive

  3. #3
    if you have saved the data to a text file, you can use the function fopen to first open the file, for this you will need a understanding of pointers, next I would sugest useing the fscanf function to retrieve formated input from your file, you could create a incrementing loop to store each number retrieved into a array. Hope this helps.
    test

  4. #4
    Member
    Join Date
    Sep 2002
    Posts
    98
    well i forgot to say that i want to read this from a file and the problem i have is assigning the
    number to the array
    -----------------------------------------------------------------------------------------------------------------------
    the game is not about how many steps you take it is about that only wrong step

  5. #5
    Senior Member
    Join Date
    Nov 2001
    Posts
    472
    You can use the <fstream.h>. I didn't actually try to compile this, but hopefully you'll get the idea. The ifs>>current will step through the file and stop for each word that is seperated by a space.

    #include <iostream.h>
    #include <fstream.h>

    main()
    ifstream ifs;
    int current;
    int myarray[12][4];
    int counter1=0;
    int counter2=0:

    ifs.open("c:\\thefile.txt");

    while(ifs>>current, !ifs.eof())
    {
    myarryay[counter2][counter1]=current;

    counter1++;
    if(counter1==5)
    {
    counter1=0;
    counter2++;
    }
    }
    ---
    proactive

  6. #6
    Senior Member
    Join Date
    Oct 2001
    Posts
    186
    In c++ you can use something like this. The array i used is incorrect but the basic idea should help. If you want i can post a similar program where i input from one file and output a result in another html file. Hope this helps

    #include <iostream>
    #include <fstream>

    ifstream in_stream;
    ofstream out_stream;

    //open fileone and filetwo for input and output

    in_stream.open("fileone.txt");
    out_stream.open("filetwo.txt");

    //to get the variables or strings, whatever you chose

    i =0;
    while (in_stream >> array[i]){
    i++
    }

    in_stream.close( );
    out_stream.close( );
    Ben Franklin said it best. \"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.\"

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