Passing different types of arguments to a function as one parameter?

This is a discussion on Passing different types of arguments to a function as one parameter? within the C Programming forums, part of the General Programming Boards category; Hi everyone I have a question: How can I make a function accept different types of arguments? For example, a ...

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    Question Passing different types of arguments to a function as one parameter?

    Hi everyone I have a question: How can I make a function accept different types of arguments? For example, a square function that takes int, float, long and double that computes the square of the argument and is transparent to the data type of the argument:

    void square ( ??????? n) {
    printf ("%f", (float) n*n);
    }

    Is this doable? Thanks a lot!

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    In C++ it is done with function overloading.

    In C you can pass an additional parameter that declares the type of the other parameter. ie:

    void square(int type, void *value)
    switch(type)
    {
    case: 1 /* int */
    printf("%d", (int)*value * (int)*value);
    break:
    case: 2 /* float */
    printf("%f", (float)*value * (float)*value);
    ...

    If you look in the FAQ your will find an entry for variable argument lists, this is another method that can be used.

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    Thank you!

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