Trying to print a data file with words and numbers

This is a discussion on Trying to print a data file with words and numbers within the C Programming forums, part of the General Programming Boards category; Hi, I'm trying to create a menu for a program by printing a data file. This is what it looks ...

  1. #1
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    Trying to print a data file with words and numbers

    Hi, I'm trying to create a menu for a program by printing a data file. This is what it looks like

    WELCOME TO MAZE-RUNNER DEMO


    THIS IS NOT YOUR MAZE RUNNER! This is a demo of possible Maze Runner Levels.

    The Levels are:

    Level 0: Drive the Mouse.
    You may use the a,s,d,w commands in the predefined
    visible maze.

    Level 1: Mouse Discovers
    You may use Level 0 commands and r,l and m commnad
    in the predefined hidden maze

    Level 2: Mouse Explores
    You may use Level 1 commands and the n command

    Level 3: Da Frills
    Not provided.


    and i'm trying to print it like this

    insert
    Code:
    #include<stdio.h>
    #include "menu.h"
    
    main()
    {
           int lvl = 100;
            char f;
            FILE *fp;
            char words [100];
    
    
    
           fp = fopen ("demo_intro", "r");
    
            fscanf(fp, "%s", &f);
            fprintf(fp, "%-100.100s",f);
    }
    I have never used fprint,fscan, or fopen before so I don't know how to use them at all. I am hoping someone will first be able to tell me if i can actually print that data file and secondly, teach me how to open and print it using code. Thank you a lot.

  2. #2
    Programming Wraith GReaper's Avatar
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    You should then look up the tutorials of this or any other site first!
    Devoted my life to programming...

  3. #3
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    I did look it up, that's how i got that code, but i don't understand why it won't work because it gives me segmentation fault.

  4. #4
    a_capitalist_story
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    First, you don't check that you successfully opened the file. Second,
    Code:
    char f;
    ...
    fscanf(fp, "%s", &f);
    you're attempting to use the character string formatter, %s, to read a single character.

  5. #5
    Registered User claudiu's Avatar
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    That's perhaps because you are trying to read a string into a character. Also main() should be int main(void) and should return 0.
    1. Get rid of gets(). Never ever ever use it again. Replace it with fgets() and use that instead.
    2. Get rid of void main and replace it with int main(void) and return 0 at the end of the function.
    3. Get rid of conio.h and other antiquated DOS crap headers.
    4. Don't cast the return value of malloc, even if you always always always make sure that stdlib.h is included.

  6. #6
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    Something like this:
    Code:
    fgets(buffer, BUF_SIZE, fh);
    printf("buffer: %s\n", buffer);

  7. #7
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    Quote Originally Posted by Weyoun92 View Post
    I did look it up, that's how i got that code, but i don't understand why it won't work because it gives me segmentation fault.
    Do you not have documentation for your compiler and it's libraries?

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