Как запустить код?

#include <iostream>
#include <vector>
#include <utility>
#include <algorithm>
#include <chrono>
#include <cmath>
using namespace std;
 
#include <stdio.h>
#include <Windows.h>
 
int nScreenWidth = 120;         // Console Screen Size X (columns)
int nScreenHeight = 40;         // Console Screen Size Y (rows)
int nMapWidth = 16;             // World Dimensions
int nMapHeight = 16;
 
float fPlayerX = 14.7f;         // Player Start Position
float fPlayerY = 5.09f;
float fPlayerA = 0.0f;          // Player Start Rotation
float fFOV = 3.14159f / 4.0f;   // Field of View
float fDepth = 16.0f;           // Maximum rendering distance
float fSpeed = 5.0f;            // Walking Speed
 
int main()
{   system("mode 120,40");
 
    // Create Screen Buffer
    wchar_t *screen = new wchar_t[nScreenWidth*nScreenHeight];
    HANDLE hConsole = CreateConsoleScreenBuffer(GENERIC_READ | GENERIC_WRITE, 0,
                      NULL, CONSOLE_TEXTMODE_BUFFER, NULL);
    SetConsoleActiveScreenBuffer(hConsole);
    DWORD dwBytesWritten = 0;
 
    // Create Map of world space # = wall block, . = space
    wstring map;
    map += L"#########.......";
    map += L"#...............";
    map += L"#.......########";
    map += L"#..............#";
    map += L"#......##......#";
    map += L"#......##......#";
    map += L"#..............#";
    map += L"###............#";
    map += L"##.............#";
    map += L"#......####..###";
    map += L"#......#.......#";
    map += L"#......#.......#";
    map += L"#..............#";
    map += L"#......#########";
    map += L"#..............#";
    map += L"################";
 
    auto tp1 = chrono::system_clock::now();
    auto tp2 = chrono::system_clock::now();
 
    while (1)
    {   // We'll need time differential per frame to calculate modification
        // to movement speeds, to ensure consistant movement, as ray-tracing
        // is non-deterministic
        tp2 = chrono::system_clock::now();
        chrono::duration<float> elapsedTime = tp2 - tp1;
        tp1 = tp2;
        float fElapsedTime = elapsedTime.count();
 
 
        // Handle CCW Rotation
        if (GetAsyncKeyState((unsigned short)'A') & 0x8000)
            fPlayerA -= (fSpeed * 0.75f) * fElapsedTime;
 
        // Handle CW Rotation
        if (GetAsyncKeyState((unsigned short)'D') & 0x8000)
            fPlayerA += (fSpeed * 0.75f) * fElapsedTime;
 
        // Handle Forwards movement & collision
        if (GetAsyncKeyState((unsigned short)'W') & 0x8000)
        {   fPlayerX += sinf(fPlayerA) * fSpeed * fElapsedTime;;
            fPlayerY += cosf(fPlayerA) * fSpeed * fElapsedTime;;
            if (map.c_str()[(int)fPlayerX * nMapWidth + (int)fPlayerY] == '#')
            {   fPlayerX -= sinf(fPlayerA) * fSpeed * fElapsedTime;;
                fPlayerY -= cosf(fPlayerA) * fSpeed * fElapsedTime;;
            }
        }
 
        // Handle backwards movement & collision
        if (GetAsyncKeyState((unsigned short)'S') & 0x8000)
        {   fPlayerX -= sinf(fPlayerA) * fSpeed * fElapsedTime;;
            fPlayerY -= cosf(fPlayerA) * fSpeed * fElapsedTime;;
            if (map.c_str()[(int)fPlayerX * nMapWidth + (int)fPlayerY] == '#')
            {   fPlayerX += sinf(fPlayerA) * fSpeed * fElapsedTime;;
                fPlayerY += cosf(fPlayerA) * fSpeed * fElapsedTime;;
            }
        }
 
        for (int x = 0; x < nScreenWidth; x++)
        {   // For each column, calculate the projected ray angle into world space
            float fRayAngle = (fPlayerA - fFOV/2.0f) + ((float)x / (float)nScreenWidth) *
                              fFOV;
 
            // Find distance to wall
            float fStepSize =
                0.1f;         // Increment size for ray casting, decrease to increase
            float fDistanceToWall = 0.0f; //                                      resolution
 
            bool bHitWall = false;      // Set when ray hits wall block
            bool bBoundary = false;     // Set when ray hits boundary between two wall blocks
 
            float fEyeX = sinf(fRayAngle); // Unit vector for ray in player space
            float fEyeY = cosf(fRayAngle);
 
            // Incrementally cast ray from player, along ray angle, testing for
            // intersection with a block
            while (!bHitWall && fDistanceToWall < fDepth)
            {   fDistanceToWall += fStepSize;
                int nTestX = (int)(fPlayerX + fEyeX * fDistanceToWall);
                int nTestY = (int)(fPlayerY + fEyeY * fDistanceToWall);
 
                // Test if ray is out of bounds
                if (nTestX < 0 || nTestX >= nMapWidth || nTestY < 0 || nTestY >= nMapHeight)
                {   bHitWall = true;            // Just set distance to maximum depth
                    fDistanceToWall = fDepth;
                }
                else
                {   // Ray is inbounds so test to see if the ray cell is a wall block
                    if (map.c_str()[nTestX * nMapWidth + nTestY] == '#')
                    {   // Ray has hit wall
                        bHitWall = true;
 
                        // To highlight tile boundaries, cast a ray from each corner
                        // of the tile, to the player. The more coincident this ray
                        // is to the rendering ray, the closer we are to a tile
                        // boundary, which we'll shade to add detail to the walls
                        vector<pair<float, float>> p;
 
                        // Test each corner of hit tile, storing the distance from
                        // the player, and the calculated dot product of the two rays
                        for (int tx = 0; tx < 2; tx++)
                            for (int ty = 0; ty < 2; ty++)
                            {   // Angle of corner to eye
                                float vy = (float)nTestY + ty - fPlayerY;
                                float vx = (float)nTestX + tx - fPlayerX;
                                float d = sqrt(vx*vx + vy*vy);
                                float dot = (fEyeX * vx / d) + (fEyeY * vy / d);
                                p.push_back(make_pair(d, dot));
                            }
 
                        // Sort Pairs from closest to farthest
                        sort(p.begin(), p.end(), [](const pair<float, float> &left,
                                                    const pair<float, float> &right)
                        {   return left.first < right.first;
                        });
 
                        // First two/three are closest (we will never see all four)
                        float fBound = 0.01;
                        if (acos(p.at(0).second) < fBound) bBoundary = true;
                        if (acos(p.at(1).second) < fBound) bBoundary = true;
                        if (acos(p.at(2).second) < fBound) bBoundary = true;
                    }
                }
            }
 
            // Calculate distance to ceiling and floor
            int nCeiling = (float)(nScreenHeight/2.0) - nScreenHeight / ((
                               float)fDistanceToWall);
            int nFloor = nScreenHeight - nCeiling;
 
            // Shader walls based on distance
            short nShade = ' ';
            if (fDistanceToWall <= fDepth / 4.0f)           nShade = 0x2588;    // Very close
            else if (fDistanceToWall < fDepth / 3.0f)       nShade = 0x2593;
            else if (fDistanceToWall < fDepth / 2.0f)       nShade = 0x2592;
            else if (fDistanceToWall < fDepth)              nShade = 0x2591;
            else                                            nShade = ' ';       // Too far away
 
            if (bBoundary)      nShade = ' '; // Black it out
 
            for (int y = 0; y < nScreenHeight; y++)
            {   // Each Row
                if(y <= nCeiling)
                    screen[y*nScreenWidth + x] = ' ';
                else if(y > nCeiling && y <= nFloor)
                    screen[y*nScreenWidth + x] = nShade;
                else // Floor
                {   // Shade floor based on distance
                    float b = 1.0f - (((float)y -nScreenHeight/2.0f) / ((float)nScreenHeight /
                                      2.0f));
                    if (b < 0.25)       nShade = '#';
                    else if (b < 0.5)   nShade = 'x';
                    else if (b < 0.75)  nShade = '.';
                    else if (b < 0.9)   nShade = '-';
                    else                nShade = ' ';
                    screen[y*nScreenWidth + x] = nShade;
                }
            }
        }
 
        // Display Stats
        swprintf_s(screen, 40, L"X=%3.2f, Y=%3.2f, A=%3.2f FPS=%3.2f ", fPlayerX,
                   fPlayerY, fPlayerA, 1.0f/fElapsedTime);
 
        // Display Map
        for (int nx = 0; nx < nMapWidth; nx++)
            for (int ny = 0; ny < nMapWidth; ny++)
            {   screen[(ny+1)*nScreenWidth + nx] = map[ny * nMapWidth + nx];
            }
        screen[((int)fPlayerX+1) * nScreenWidth + (int)fPlayerY] = 'P';
 
        // Display Frame
        screen[nScreenWidth * nScreenHeight - 1] = '\0';
        WriteConsoleOutputCharacterW(hConsole,
                                     (LPCWSTR)screen,
                                     nScreenWidth * nScreenHeight, { 0,0 }, &dwBytesWritten);
    }
 
    return 0;
}