passing a filename as a parameter..

This is a discussion on passing a filename as a parameter.. within the C Programming forums, part of the General Programming Boards category; How can a filename be passed as a parameter from one function to another function? For instance I have a ...

  1. #1
    Registered User
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    Question passing a filename as a parameter..

    How can a filename be passed as a parameter from one function to another function? For instance I have a filname as a string defined as:
    char[] = "filename.txt" ;
    What would the format of the function that passes it look like and the format of the receiving function look like?
    Thanks!
    Flight

  2. #2
    Wannabe Coding God
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    you pass the adress to the first element in the string.
    They say that if you play a Windows Install CD backwords, you hear satanic messages. That's nothing; play it forward and it installs Windows.

  3. #3
    Just Lurking Dave_Sinkula's Avatar
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    >How can a filename be passed as a parameter from one function to another function?

    You could do something like this.
    Code:
    #include <stdio.h>
    
    void foo(const char *filename)
    {
       FILE *file = fopen(filename, "r");
       if(file != NULL)
       {
          printf("%s: opened\n", filename);
          fclose(file);
          printf("%s: closed\n", filename);
       }
       else
       {
          perror(filename);
       }
    }
    int main(void)
    {
       const char filename[] = "filename.txt";
       foo(filename);
       return 0;
    }
    
    /* my output
    filename.txt: No such file or directory
    */
    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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