Thread: Rounding Floats

  1. #1
    Registered User
    Join Date
    Feb 2003

    Rounding Floats

    Hi, I was wondering if anybody knows an easy way to round floats. I wrote a program calculating money, and I'd like to display the right amount of decimal places for dollars and cents. Right now, it's printing numbers like "156.945957" and I'd just like it to print "156.95". Thanks in advance.

  2. #2
    Registered User Draco's Avatar
    Join Date
    Apr 2002
    if you want to round to a certain decimal amount every time, you can just use the printf conversion.

    printf("Random number = %.3f ", floatingnum);

  3. #3
    Registered User
    Join Date
    Jan 2003
    you can use printf and specify how much to round up by with %.Nf where N represents how far you want to round off.
    i.e. %.2f will round off to 2 decimal places. %.3f will go to 3 decimal places and so on.
    there are only 10 people in the world, those who know binary and those who dont

  4. #4
    Registered User
    Join Date
    Feb 2003


    Thanks! It Works!

  5. #5
    still a n00b Jaguar's Avatar
    Join Date
    Jun 2002
    Whatabout rounding float and stores it in float variables?
    Normally I write my own function to do this, but any instant functions else?
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  6. #6
    Registered User pinko_liberal's Avatar
    Join Date
    Oct 2001
    Have a look at the functions floor and ceil in math.h
    The one who says it cannot be done should never interrupt the one who is doing it.

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