2D arrays

This is a discussion on 2D arrays within the C++ Programming forums, part of the General Programming Boards category; I have a text file with "$" chars only in it, I need to put this file into a 2D ...

  1. #1
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    Question 2D arrays

    I have a text file with "$" chars only in it, I need to put this file into a 2D array[25][50], then count how many $ chars there are in the file, and output file and count to screen, any clues???Please help!!

  2. #2
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    I may not understand the assignment, but here goes.

    Code:
    #include <cstdlib>
    #include <fstream>
    #include <cstring>
    using namespace std;
    
    int main()
    {
       char lines[25][50];
       char *filename = "sample.txt";
       int num_of_lines = 0;
       int count = 0;
       int i, j;
    
       ifstream in(filename);
       if (!in)
       {
          cout << "Could not open file:" << filename << endl;
          return 0;
       }
       while (in.getline(lines[num_of_lines],50))
       {
          num_of_lines++;
       }
       for (i=0; i<num_of_lines; i++)
       {
          cout << lines[i] << endl;
          for (j=0; j<strlen(lines[i]); j++)
             if (lines[i][j] == '$')
                count++;
       }
       cout << "$ found:" << count << endl;
       return 0;
    }

  3. #3
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    Forgot to close the file. Add this before the "return" at the end.
    in.close();

  4. #4
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    Or before the for-loop.

  5. #5
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    .dat file

    This works excellent if I save file as txt file, but my file is a .dat file and it wont read file, I can't find why? any suggestions.

    Many thanx swoopy

  6. #6
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    Ah, no probs....got it working now.

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