#include <iostream>
using namespace std;
 
typedef void(*void_func)();
typedef void_func (*func_type) (int);
void_func arbitraryFunction(int a) {
    // could be this function, or another with the same signature, 
    cout << "arbitraryFunction\n";
    return nullptr;  
}
void_func function(int a) {
    // could be this function, or another with the same signature, 
    return (void_func) arbitraryFunction;  
}
int main() {
	// your code goes here
	func_type f = (func_type) function(0);
	f(0);
	return 0;
}

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