How to use return values

This is a discussion on How to use return values within the C++ Programming forums, part of the General Programming Boards category; Really simple question, can't seem to find an answer. How do I do anything with a return value from a ...

  1. #1
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    Dec 2008
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    How to use return values

    Really simple question, can't seem to find an answer. How do I do anything with a return value from a function. For example, I want to check the value of the return value with an if statement, what is the name of that which I should be comparing?

    Code:
    void something (blah, blah2)
    {
      ...some code here...
      return 5;
    }
    
    int main()
    {
      something (5, 7);
      if ( ??? == 5)
        {
         ...some code here...
        }
    }
    Last edited by Furious5k; 02-05-2009 at 05:42 PM.

  2. #2
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    First of all your type signature is wrong for returning an integer. Try
    Code:
    int something (int a, int b) { return(5) ; }
    Second you have to have a variable to receive the output of your function (in most cases).
    Code:
    int y = something(5,7) ;
    if (y == 5)
    {
    
    }
    You should give your C book a read now and then, or even try some of the tutorials.

  3. #3
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    66
    Quote Originally Posted by SevenThunders View Post
    First of all your type signature is wrong for returning an integer. Try
    Code:
    int something (int a, int b) { return(5) ; }
    Second you have to have a variable to receive the output of your function (in most cases).
    Code:
    int y = something(5,7) ;
    if (y == 5)
    {
    
    }
    You should give your C book a read now and then, or even try some of the tutorials.
    I was just painting in wide strokes so I forgot to add the types.

    Putting a variable to capture the return value is what I was looking for. Thanks!

  4. #4
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    Canada
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    or
    Code:
    if (something(5, 7) == 5) {
    ...
    }

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