testgamelinux c++

#include <iostream>
#include <stdlib.h> //library includes
using namespace std;
//variables
int lvl = 0;
char map[10][20][40]; //3D array: one dimension for rooms, one dimension width % height
int hp = 10;
int hpmax = 10;
int main(){ //main function
char input; //our input variable
int x = 7; //our movement variables
int y = 7;
    for(int gx = 0; gx <= 20; gx++){
    for(int gy = 0; gy <= 20; gy++)
    map[0][gy][gx] = 'x';
    } //nested for loop to generate x and y and plot it to our map
    for(int ey = 3; ey <= 17; ey++){
    for(int ex = 3; ex <= 17; ex++)
    map[0][ey][ex] = ' ';
    } //another nested for loop to fill spaces to our map
    map[0][11][11] = '#';
    map[0][15][14] = '#';
    map[0][4][4] = '#';
    map[0][16][16] = 'E';
    map[0][7][7] = '@';

    for(int gx = 0; gx <= 20; gx++){
    for(int gy = 0; gy <= 20; gy++)
    map[1][gy][gx] = 'x';
    } //for the second map
    for(int ey = 3; ey <= 17; ey++){
    for(int ex = 3; ex <= 17; ex++)
    map[1][ey][ex] = ' ';
    }
    map[1][6][11] = '#';
    map[1][7][14] = '#';
    map[1][7][9] = '#';
    map[1][3][3] = 'E';
    while(1){
             system("cls"); //Clear the screen....
             for(int row = 0; row <= 20; row++){
             for(int col = 0; col <= 20; col++)
             cout << map[lvl][col][row];
             cout << endl;
             } //output the map
             cin >> input; //input
             //movement
             switch(input){
                           case 'd':
                                if(map[lvl][y+1][x] == 'x') break; //break if y+1 is x
                                if(map[lvl][y+1][x] == 'E') lvl += 1; //go to next level lvl
                                map[lvl][y][x] = ' '; //fill in a space for now
                                y += 1; //increment it
                                map[lvl][y][x] = '@'; //then put a @ un the movement
                                break; //then break, otherwise ot would do all of them
                           case 'a':
                                if(map[lvl][y-1][x] == 'x') break;
                                if(map[lvl][y-1][x] == 'E') lvl += 1;
                                map[lvl][y][x] = ' ';
                                y -= 1;
                                map[lvl][y][x] = '@';
                                break;
                           case 's':
                                if(map[lvl][y][x+1] == 'x') break;
                                if(map[lvl][y][x+1] == 'E') lvl += 1;
                                map[lvl][y][x] = ' ';
                                x += 1;
                                map[lvl][y][x] = '@';
                                break;
                           case 'w':
                                if(map[lvl][y][x-1] == 'x') break;
                                if(map[lvl][y][x-1] == 'E') lvl += 1;
                                map[lvl][y][x] = ' ';
                                x -= 1;
                                map[lvl][y][x] = '@';
                                break;
                            }
                        }
}