Question

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Typedef function pointer?

Could you please help me understand the meaning of this typedef and how to use it?

typedef void (*__handler)(int)

without the “typedef”, I know the rest is a function pointer. Thank you.

Answer 1

This defines a type name for the function pointer. Using this, __handler is now a type alias for a pointer to a function that takes an int and returns void.

void myFunction(int)
{
    // ...
}

int main(int argc, char **argv)
{
    __handler functionPtr = &myFunction;

    // ...
}