"２次元配列"
#include <iostream>
using namespace std;
const int ARR_SIZE = 8;
 
int main() {
	//二次元配列
	float arr[4][2] ={{1.2, 2.4}, {3.6, 4.8}, {5.2, 3.1}, {2.6, 1.1}};
	int zaseki[9][4] = {{0,2,3,4},{1,2,3,4},{2,2,3,4},{3,2,3,4},{4,2,3,4},
                            {5,2,3,4},{6,2,3,4},{7,2,3,4},{8,2,3,4} };
	// for(int i=0; i<ARR_SIZE; i++)
	// {
	// 	cout << "arr[" << i << "] = " << arr[i] << endl;
	// } //ループ終了後、死亡確定
	for(int j=0;j<9;j++)
	{
		for(int i=0;i<4;i++)
		{
			cout << zaseki[j][i] << " ";	
		}
		cout << endl;
	}
	cout << "九々表の表示" << endl;
	//int kuku[9][9];
	//九々表を埋めて表示
	int kuku[9][9]; //[0~8][0~8]
	for(int j=1; j<=9; j++){
		for(int i=1; i<=9; i++){
			kuku[j-1][i-1] = i*j;
		}
	}
	for(int j=1; j<=9; j++){
		for(int i=1; i<=9; i++){
			cout << kuku[j-1][i-1] << " ";
		}
		cout << endl;
	}
 
}

Siv3Dで2Dマップ

"マップエディタ"
# include <Siv3D.hpp> // OpenSiv3D v0.6.10
 
void Main()
{
	// 背景の色を設定する | Set the background color
	Scene::SetBackground(ColorF{ 0.6, 0.8, 0.7 });
 
	// 絵文字からテクスチャを作成する | Create a texture from an emoji
	//const Texture emoji{ U"🦖"_emoji };
	TextureAsset::Register(U"dragon", { U"🟫"_emoji });
	TextureAsset::Register(U"hana", { U"🌷"_emoji });
	TextureAsset::Register(U"ki", { U"🌳"_emoji });
	TextureAsset::Register(U"ie", { U"🏠"_emoji });
 
 
 
	Texture images[4] = { TextureAsset(U"dragon"),
							TextureAsset(U"hana"),
							TextureAsset(U"ki"),
							TextureAsset(U"ie") };
	const Size imageSize(32, 32);
 
	int map[19][25] = {
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,2,2,2,2,2,2,2,3,2,2,2,2,2,2,2,3,2,2,2,1,2,2,2,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
		{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0} };
 
 
	while (System::Update())
	{
		for (int j = 0; j < 19; j++) {
			for (int i = 0; i < 25; i++) {
				images[map[j][i]].resized(32,32).draw(i * 32, j * 32);
			}
		}
	}
}