what is the meaning of this warning..

This is a discussion on what is the meaning of this warning.. within the C Programming forums, part of the General Programming Boards category; warning: control reaches end of non-void function|...

  1. #1
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    what is the meaning of this warning..

    warning: control reaches end of non-void function|

  2. #2
    Kernel hacker
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    That you are not returning from all paths that exit the function - usually that there isn't a return at the end of the function.

    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
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  3. #3
    pwning noobs Zlatko's Avatar
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    The function is declared to return a value, for example int or double and so you must use a return statement to return a value at the end of the function. Any return statement in the function must specify a value.

  4. #4
    C++まいる!Cをこわせ! Elysia's Avatar
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    Also happens if there are no return statements.
    In short, make sure your function returns a proper value with one or more return statements. Or make the function return void.
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    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

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  5. #5
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    Quote Originally Posted by Elysia View Post
    Also happens if there are no return statements.
    In short, make sure your function returns a proper value with one or more return statements. Or make the function return void.
    Huh? That's silly. You mean as in:
    Code:
    int test_it(void) {
    return void; }
    Not legal.

  6. #6
    Guest Sebastiani's Avatar
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    I think what Elysia was saying was to make the return value void, ie:

    Code:
    void foo( void )
    {
        //...
    }
    Code:
    #include <cmath>
    #include <complex>
    bool euler_flip(bool value)
    {
        return std::pow
        (
            std::complex<float>(std::exp(1.0)), 
            std::complex<float>(0, 1) 
            * std::complex<float>(std::atan(1.0)
            *(1 << (value + 2)))
        ).real() < 0;
    }

  7. #7
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    Quote Originally Posted by nonoob View Post
    Huh? That's silly. You mean as in:
    Code:
    int test_it(void) {
    return void; }
    Not legal.
    Erm... I kind of guess he meant:
    Code:
    void test_it(){}
    Legal.

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