fprintf will NOT WORK !!!

This is a discussion on fprintf will NOT WORK !!! within the C Programming forums, part of the General Programming Boards category; Been hammering @ this for a few days now. The code works like a champ. I just need the results ...

  1. #1
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    Angry fprintf will NOT WORK !!!

    Been hammering @ this for a few days now. The code works like a champ. I just need the results printed @ the specified loc(myOutput.txt). Unfortionaly this is giving me trouble, can someone help me a little and figure out where I went wrong:

    include <stdio.h>
    #include <conio.h>
    #include <math.h>

    void main(void)
    {
    char c;
    int N,x,iter = 1;

    FILE *outptr;
    outptr=fopen("myOutput.txt","wt");
    printf("\nPlease enter a value for N ");
    scanf("%i",&N);
    printf("\n ");
    for(x = N, iter = 0; x > 1; x--)
    {
    printf("%i", x);
    printf(" + ");
    iter = iter + x;
    fprintf(outptr, "%i", x);
    fprintf(outptr, " + ");
    }
    printf(" 1 = ");
    printf("%i", iter);
    getch();
    fclose(outptr);

  2. #2
    Guest Sebastiani's Avatar
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    outptr=fopen("myOutput.txt","wt");
    "wt" is not a valid mode. It's "w" for text mode, "wb" for binary.
    Code:
    bool fun(bool value)
    {
        return std::pow(std::exp(1), std::complex<float>(0, 1) 
        * std::complex<float>(std::atan(1)*(1 << (value + 2))))
        .real() > 0;
    }

  3. #3
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    Nope still doesn't work... The myOutput.txt is created but thinging goes into it. I just don't get it, It doesn't make sense.

  4. #4
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    Don't use void main. If you're familar with the statements your coding with in this program, try reading the source code backwards. You usually catch the small errors better that way. If the file is created, but nothing is placed in it, look over your fprintf statements closely.
    The world is waiting. I must leave you now.

  5. #5
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    Maybe try using a different output function. Try fputs(), considering you are not making use of the formatting capabilities of the printf() family.
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  6. #6
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    Make sure there is a # in front of include <stdio.h>.
    Why not print to the screen and see if it works?

  7. #7
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    Okay, I replaced the fprints w/fputs still does not work. Also There was a #by include I just missed it when I coppied the source. Also What should I put instead of void main void; this is how I was taught.

    Any other ideas ?

    It justs doesn't make sense, and its starting to ........ me off :-)

  8. #8
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    Maybe try adding stdlib.h.

  9. #9
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    int main (void)

  10. #10
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    I assume you have return(0) and the closing brace.
    You define a char c, but don't seem to use it?

  11. #11
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    nope

    Tried the int main (void) and the <stdlib.h>. I swaer if I don't fix this I am gonna throw my laptop throughmy window.

  12. #12
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    The return(0) satisfies the int part of int main (void).
    Why the getch() at the end?

  13. #13
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    If you're not in too big of a hurry, Prelude or one of the others could figure this out real quick in the morning.

  14. #14
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    I am not fimiliar w/ int main (void).... Getch(); lets the program stop at the end so you can see your code not flash by. I don't get however what you mean ? Are you seggesting that when using int main (void) to use return(0); instead of getch();.

    ?

  15. #15
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    int main (void) is the standard way to write main.
    Since you specified that you are returning an int,
    you include return (0) at the end of main.
    I see now how you are using getch().

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