Thread: Finding values in input file

  1. #1
    Registered User
    Join Date
    May 2004

    Question Finding values in input file

    what is the best way to determine how many values are contained in an input pointer file and store in a variable? any ideas appreciated.

  2. #2
    ATH0 quzah's Avatar
    Join Date
    Oct 2001
    Open the file.
    Read its contents.
    Store the restults.
    Close the file.

    Other than that, you'll have to clarify what you mean by "an input pointer file" and "store in a variable".

    Hope is the first step on the road to disappointment.

  3. #3
    Registered User
    Join Date
    May 2004
    sorry, i was a little vague, but actually im just looking for a function to read the # of data values in the file.

    like if file contained: 10,20,30,40,50,60
    the function would read 6 values... and store 6 in a variable
    i can use fscanf to read data but not to tell how many values are present.

  4. #4
    Just Lurking Dave_Sinkula's Avatar
    Join Date
    Oct 2002
    Some variant of this, perhaps?
    /* file.txt
    #include <stdio.h>
    int main(void)
       const char filename[] = "file.txt";
       FILE *file = fopen(filename, "r");
       if ( file )
          int value, count = 0;
          while ( fscanf(file, "%d%*c", &value) == 1 )
          printf("count = %d\n", count);
       return 0;
    /* my output
    count = 6
    7. It is easier to write an incorrect program than understand a correct one.
    40. There are two ways to write error-free programs; only the third one works.*

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