#include <iostream>

void takeIt(void* arg) {
	auto arr = reinterpret_cast<int(*)[4]>(arg);
	std::cout << arr[1][2];
}

int main() {
	int a[3][4] = {0,1,2,3,4,5,6,7,8,9,10,11};
	takeIt(reinterpret_cast<void*>(a));
}