Thread: Conversions, Strings and printf

  1. #1
    Registered User
    Join Date
    Nov 2010

    Question Conversions, Strings and printf

    Consider the following code:

    #include <stdio.h>

    int main() {
    int i=8, j=9;
    char m[]=" \"file\"";
    char d = 'x';
    printf("%c%s\n%d\n", d,m,i%j);
    return 0;

    which prints:

    x "file"

    There are two parts of this code that I am unsure of. One is "i%j" argument in the printf function. Exactly what does this call for (well obviously it ends up as 8 but why)? How do you read this to yourself?

    My second question is with regards to the string " \"file\"". Why are the "\" characters omitted in the output?

  2. #2
    Join Date
    Aug 2010
    Ontario Canada
    The % sign used in the i % j statement is a modulous function... It's the remainder of i/j

    The \ don't appear in "file" because they are C escape characters... In a string literal \" causes the quotation mark to be printed, where it would normally terminate the string.

  3. #3
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    << !! Posting Code? Read this First !! >>
    Read it, understand it, post readable code next time.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

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