#include <iostream>
#include <vector>

using byte = unsigned char;

std::vector<uint16_t> GetIntArrayFromByteArray(const std::vector<byte>& byteArray)
{
    const int inputSize = byteArray.size();
    const bool inputIsOddCount = inputSize % 2 != 0;
    const int finalSize = (int)(inputSize/2.0 + 0.5);
    // Ignore the last odd item in loop and handle it later
    const int loopLength = inputIsOddCount ? inputSize - 1 : inputSize;
    
    std::vector<uint16_t> intArray;
    // Reserve space for all items
    intArray.reserve(finalSize);
    for (int i = 0; i < loopLength; i += 2) 
    {
      intArray.push_back((uint16_t)((byteArray[i] << 8) | byteArray[i + 1]));
    }

    // If the input was odd-count, we still have one byte to add, along with a zero
    if(inputIsOddCount) 
    {
      // The zero in this expression is redundant but illustrative
      intArray.push_back((uint16_t)((byteArray[inputSize-1] << 8) | 0));
    }
    return intArray;
}

int main() {
	const std::vector<byte> numbers{2,0,0,0,1,0,0,1,4};
	const std::vector<uint16_t> result(GetIntArrayFromByteArray(numbers));
	
	for(uint16_t num: result) {
		std::cout << num << "\n";
	}
	
	return 0;
}