Thread: Formatting printf

  1. #1
    Registered User
    Join Date
    Sep 2003

    Formatting printf

    ok say i have an array of numbers like this:

    double num[] = {15.5, 17.2, 17.4, 15.2, 15.3, 17.8, 17.5}
    and i want to print them out on the screen like this:

    for(i = 1; i<n; ++i) printf("%6.1lf\n", num[i]);
    how do i format the output so that i can print them out neatly 3 numbers per line, then another line underneath??

    For Eg;

    15.5  17.2  17.4

  2. #2
    ATH0 quzah's Avatar
    Join Date
    Oct 2001
    Remove the \n from your printf.
    Then add an if check that checks to see if the counter is a multiple of 3, and if so, put a newline before you print the next line.

    Hope is the first step on the road to disappointment.

  3. #3
    Been here, done that.
    Join Date
    May 2003

    Re: Formatting printf

    First, fix the for loop:
    for(i = 0; i<n; ++i)
    Then do what quzah said, since he beat me. Use the modulus operator % within the for loop
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