Simple Array 1D to Array 2D and back

array1d_array_2d_example.cpp

#include <iostream>
#include <string>
#include <vector>

static std::vector<int> map;
static int mapSize = 3;

int initMap()
{
    for (int i = 0; i < (mapSize * mapSize); i++) {
        map.push_back(0);
    }
}

int setMapValue(int index, int value)
{
    auto nx = index % mapSize;
    auto ny = index / mapSize;
    auto mIndex = nx + ny * mapSize;
    map[mIndex] = value;
    
    std::cout << "Setting Map Data at (" << nx << ", " << ny << ")" << std::endl;
}

void printMap()
{
    for (int y = 0; y < mapSize; y++) {
        std::cout << "[ ";
        for (int x = 0; x < mapSize; x++) {
            std::cout << map[x + y * mapSize] << " ";
        }
        std::cout << "]" << std::endl;
    }
}

int main()
{
  initMap();
  setMapValue(0, 5);
  printMap();
}