Maze generation and unicode characters

[Yoan]

I need help making my maze look better.I want to use unicode characters but my program crashes.

#include <iostream>
#include <ctime>
#include <cstring>
using std::cout;
using std::fill;
using std::endl;
using std::cin;
using std::cout;

   int main()
    {
        srand(time(NULL));
        int arr_x[1000] = { 0 }; fill(arr_x + 0, arr_x + 1000, -1);
        int arr_y[1000] = { 0 }; fill(arr_y + 0, arr_y + 1000, -1);
//coordinates used to go back when the generation runs into blocked path 


        char arr[100][100]; memset(arr, '#', sizeof(char) * 100 * 100);
    //creating 100x100 char array of #
        int rows, cols = 0;
        cout << "Rows "; cin >> rows;//choose 
        cout << "Columns"; cin >> cols;

        int random_number = 0; int x = 0; int y = 0; int index = 0;
        arr[0][0] = ' ';

        while (1)
        {

            random_number = rand() % (4) + 1;
            int available_paths = 0;
            if (x + 1 >= 0 && x + 1 < rows && arr[x + 1][y] != ' ' && arr[x + 2][y] != ' ' && arr[x + 1][y + 1] != ' ' && arr[x + 1][y - 1] != ' ') { available_paths++; if (random_number == 1) { x = x + 1; arr_x[index] = x; arr_y[index] = y; arr[x][y] = ' '; index++; } }
            if (x - 1 >= 0 && x - 1 < rows && arr[x - 1][y] != ' ' && arr[x - 2][y] != ' ' && arr[x - 1][y + 1] != ' ' && arr[x - 1][y - 1] != ' ') { available_paths++; if (random_number == 2) { x = x - 1; arr_x[index] = x; arr_y[index] = y; arr[x][y] = ' '; index++; } }
            if (y + 1 >= 0 && y + 1 < cols && arr[x][y + 1] != ' ' && arr[x][y + 2] != ' ' && arr[x + 1][y + 1] != ' ' && arr[x - 1][y + 1] != ' ') { available_paths++; if (random_number == 3) { y = y + 1; arr_x[index] = x; arr_y[index] = y; arr[x][y] = ' '; index++; } }
            if (y - 1 >= 0 && y - 1 < cols && arr[x][y - 1] != ' ' && arr[x][y - 2] != ' ' && arr[x + 1][y - 1] != ' ' && arr[x - 1][y - 1] != ' ') { available_paths++; if (random_number == 4) { y = y - 1; arr_x[index] = x; arr_y[index] = y; arr[x][y] = ' '; index++; } }
            if (available_paths == 0) //if available_paths are 0 I need to go 
            {                         //back to the last visited square
                index = index - 1;
                if (index < 0) { break; }
                x = arr_x[index]; y = arr_y[index];
            }
        }


        for (int x = 0; x < rows; x++)
        {
            for (int y = 0; y < cols; y++)
            {
                cout << "[" << arr[x][y] << "]";
                if (y == (cols - 1)) { cout << endl; }
            }
        }

        int end;
        cin >> end;
    }

Please help me display my maze using ▮.

[Cubbi]

Do you want to display ▮ where you currently display #?

On non-WIndows OS, just replace line 49 with
cout << "[" << (arr[x][y] == '#' ? "▮" : " ") << "]";
(which goes a small way towards separating data model from presentation)

$ ./test
Rows 5
Columns10
[ ][ ][ ][ ][ ][▮][ ][ ][ ][▮]
[▮][▮][▮][▮][ ][▮][ ][▮][ ][ ]
[ ][ ][ ][ ][ ][▮][ ][ ][▮][ ]
[▮][ ][▮][▮][▮][ ][ ][▮][▮][ ]
[ ][ ][ ][ ][ ][ ][▮][ ][ ][ ]

on Windows, there are the usual complications of twisting its arm to support any sort of Unicode, but msvc2017/win10 should be enough to only do two things: use u8"▮" instead of "▮", and call SetConsoleOutputCP(CP_UTF8); as I was just showing in http://www.cplusplus.com/forum/general/220252/#msg1013553

[Yoan]

I use msvc2017/win10. For some reason the console outputs rectangle with question marks instead of ▮.

[Golden Lizard]

For unicode characters, you need to use wchar_t and std::wcout. Also note that console and unicode characters don't mix together very well.