C++ Snake Game

Here is a source code of Snake Game coded in C++ originally by me. In this game i have just used simple functions, loops, Arrays and rand() function. The border of the game is made by using for loop. And the food is generated using rand function. The kbhit() function is used to sense the key pressed and according to that it moves the snake and eat the food. Hope you will like it.

Source Code:

// Program By http://solutionscpp.blogspot.com
// Author Mansoor Ahmed
// GMail ID: secguy000@gmail.com
#‎include‬<iostream>
#include<string>
#include<conio.h>
#include<windows.h>
using namespace std;

const int width = 40;//FOR WIDTH OF FRAME
const int hight = 20;//FOR HIGHT OF FRAME
int foodx, foody;
int x;//FOR CONTROLLING X AXIS
int y;//FOR CONTROLLING Y AXIS
int score = 0;//FOR ADDING SCORE
int tailx[200] = {0};
int taily[200] = {0};
int tail = 0;
enum direction{ LEFT, RIGHT, UP, DOWN };
direction dir;
bool gameover;//FOR STARTING GAME


void start()
{
  gameover = false;
  x = width / 2;//SET THE VALUE OF X=20
  y = hight / 2;//SET THE VALUE OF Y=10
  foodx = rand() % width;//RANDOMLY GENERATE FOOD OF X AXIS
  foody = rand() % hight;//RANDOMLY GENERATE FOOD OF Y AXIS
}


void frame()
{
  system("cls");

  for (int i = 0; i < width + 2; i++)
  cout << "#";//FOR PRINTING UPPER WALL MEAN CEALING
  cout << endl;
 
  for (int i = 0; i < hight; i++)//FOR PRINTING SIDE WALLS
  {
    for (int j = 0; j < width; j++)
    {
      if (j == 0)//PRINT LEFT SIDE WALL
      {
        cout << "#";
      }
    
     if (i == y&&j == x)//FOR MAKING THE SNAKE HEAD IN CENTRE
     cout << "O";

     else if (i == foody&&j == foodx)//FOR GENERATING RANDOM FOOD IN FRAME
     cout << "*";

    else
    {
    bool print = false;

    for (int k = 0; k < tail; k++)
    {
      if (tailx[k] == j&&taily[k] == i)
      {
        cout << "0";
        print = true;
     }
    }

     if (!print) 
     {
      cout << " ";
     }
   }

    if (j == width - 1)//FOR PRINTING RIGHT SIDE WALL
    {
      cout << "#";
    }
 }

 cout << endl;
}

for (int i = 0; i < width + 2; i++)//FOR PRINTING LOWER WALL MEAN FLOOR
{
  cout << "#";

}
 cout << endl;
 cout << "SCORE: " << score << endl;
}


void direct()
{
  if (_kbhit())//WHEN USER ENTER THE KEYBOARD
  {
   switch (_getch())//IT TAKES CHARACTER
   {
    case'a':
    dir = LEFT;
    break;
    case's':
    dir = DOWN;
    break;
    case'w':
    dir = UP;
    break;
    case'd':
    dir = RIGHT;
    break;
   }
  }
}


void move()
{
  int previousx = tailx[0];
  int previousy = taily[0];
  int prev2x = 0;
  int prev2y = 0;
  tailx[0] = x;//remind first tail value of x axis
  taily[0] = y;//remind second tail value of y-ais
 for (int i = 1; i < tail; i++)
 {//for reminding previous tail position
  prev2x = tailx[i];
  prev2y = taily[i];
  tailx[i] = previousx;
  taily[i] = previousy;
  previousx = prev2x;
  previousy = prev2y;

 }

 switch (dir)
 {
  case LEFT://decrease value of x when a is pressed
  x--;
  break;
  case RIGHT://increase value of x when a is pressed
  x++;
  break;
  case UP:
  y--;//decrease value of y when w is pressed
  break;
  case DOWN:
  y++;//increase value of y when s is pressed
  break;
  default:
  break;
 }

 if (x>width - 1 || x<0 || y > hight - 1 || y<0)//when snake hit the wall game end
 gameover = true;

 for (int i = 0; i < tail; i++)
 {
   if (tailx[i] == x&&taily[i] == y)
      gameover = true;
 }

 if (x == foodx&&y == foody)//WHEN FOODX=x AND FOODY=y then generate new food
 {
  foodx = rand() % width;
  foody = rand() % hight;
  tail++;
  score += 10;//when food is eaten then score added by ten
 }

}

int main()
{
  string a;
  cout << "\n\n\n\t\t\t\t THE SNAKE GAME\n\n";
  cout << "CONTROLS:\n\nw=UP\ns=DOWN\na=RIGHT\nd=LEFT\n\n\n";
  cout << "PLEASE ENTER YOUR NAME: ";
  cin >> a;

  start();

 while (!gameover)//game condition is true
 {

  frame();
  direct();
  move();
  Sleep(100);
 }

 system("cls");

  cout << "\n\n\nOPPS YOU ARE OUT" << "\tTRY AGAIN";
  cout << endl;
  cout << a << " YOUR SCORE IS: " << score << endl;

}