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Thread: Adding doubles and ints.

  1. #1
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    Default Adding doubles and ints.

    First of all, I hate the fact Java can't just NOT separate the two. It's a bit annoying to keep up with. But anyway:

    I have a stack of strings. Some are "4.4" and some are "1".

    When they are "popped" they are then converted to a double or an integer depending on certain circumstances that are probably obvious here.

    The stack looks like this:

    4.4 1 +

    They are to be popped and added, but I have a problem right there.
    I have no idea how to add 4.4 and 1 and get an exact answer that isn't rounded down or anything like that. So what do I do?


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    Default Re: Adding doubles and ints.

    What have you tried?
    System.out.println(4.4 + 1);
    What does that output?

    Why are you bothering with ints? Why not just convert everything to double?
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    Default Re: Adding doubles and ints.

    I actually didn't know you could do that with the System.out.println command. Sorry, I'm still a bit new at this, I've only known Java for like a month.

    Edit
    Actually, that wouldn't work if 4.4+1 is part of a bigger expression.
    You're right about the doubles though.
    Last edited by SkyAphid; September 7th, 2011 at 10:02 PM.

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    Default Re: Adding doubles and ints.

    It has nothing to do with the println method and everything to do with math.
    int one = 1;
    double fourPointFour = 4.4;
    double result = fourPointFour + one;
    Works just fine too.
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    Default Re: Adding doubles and ints.

    Quote Originally Posted by SkyAphid View Post
    First of all, I hate the fact Java can't just NOT separate the two. It's a bit annoying to keep up with.
    The two serve different purposes, and people who really care about memory don't want to use something they don't need. "NOT separating the two" would be a horrible idea.
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    Default Re: Adding doubles and ints.

    It's a bit annoying to keep up with
    You will find that a lot in programming.There are Lots of important details to keep up with.

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    Default Re: Adding doubles and ints.

    Quote Originally Posted by SkyAphid View Post
    Actually, that wouldn't work if 4.4+1 is part of a bigger expression.
    What the heck are you talking about? 4.4 + 1 will produce 5.4 every single time regardless of where you place it in your code. Unless you have 4.4 + 1 * 3.2 in your expression. That of course would produce a different result due to operator precedence but the result will still be a double and you can still add, multiply, subtract and divide ints and doubles.
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