what's an overloaded function ?

This is a discussion on what's an overloaded function ? within the C Programming forums, part of the General Programming Boards category; what's an overloaded function ? why ar they useful ? thnx...

  1. #1
    Registered User Nutshell's Avatar
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    what's an overloaded function ?

    what's an overloaded function ? why ar they useful ?

    thnx

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    An overloaded function is a function with the same name that performs different operations on different data. So instead of having
    void calcFloat(float x, float y, float z);
    void calcInt(int x, int y, int z);
    void calcTwoInt(int x, int y);

    you could use

    void calcNum(float x, float y, float z);
    void calcNum(int x, int y, int z);
    void calcNum(int x, int y);

    Instead of using several function names and confusing yourself you can use a single function name with different parameters according to how you want the data handled. Think of printf, that's a version of overloaded function because it can take different types and numbers of arguments and handle them accordingly. Though overloaded functions are a bit harder to implement in C than C++.

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    Registered User Nutshell's Avatar
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    how do u create an overloaded function ? DOesn't there have to be a fixed number of parameters ? How does the function check it ?

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    Mayor of Awesometown Govtcheez's Avatar
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    > how do u create an overloaded function

    You use C++.

    C can't do overloaded functions.

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    Registered User Nutshell's Avatar
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    k thnx

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    C can do overloaded functions, but you have to get into variable lenth argument lists and have a lot of conditional programming inside of one function. In C++ you have several functions with the same name, but in C you have one function that can do calculations on all kinds of data. Usually it's not worth it in C.

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