#include <iostream>
#include <iomanip>
 
int main()
{
	long int myLong = 0x12340;
	unsigned char  myArray[16] = {};
 
	std::cout << "Initially: ";
	for (const auto& x : myArray)
		std::cout << std::setw(2) << std::setfill('0') << std::hex << static_cast<int>(x) << ' ';
	std::cout << std::endl;
 
	size_t i = sizeof(myArray) / sizeof(myArray[0]);  // Get one beyond last index of array
	for (size_t shift = 0; shift < sizeof(myLong) * 8 && i > 0; shift += 4)
		myArray[--i] = static_cast<unsigned char>((myLong >> shift) & 0x0f);
 
	std::cout << "After    : ";
	for (const auto& x : myArray)
		std::cout << std::setw(2) << std::setfill('0') << std::hex << static_cast<int>(x) << ' ';
	std::cout << std::endl;
}
 

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