SNAKE GAME-1.cpp

#include <iostream>
#include <conio.h>
#include <cstdlib> // for the rand funtion
#include <unistd.h>  // for the sleep funtion

using namespace std;

bool gameover;

const int width = 30;

const int height = 17;

int x, y, fruitX, fruitY, score;

int tailX[100], tailY[100]; //snake coordinates

int nTail;

enum eDirecton {STOP = 0, LEFT,RIGHT, UP,DOWN}; // Controls

eDirecton dir;

void Setup() {
   gameover = false;
   
   dir = STOP;
   
   x = width / 2;
   
   y = height / 2;
   
   fruitX = rand() % width; //display fruit in a random place
   
   fruitY = rand() % height; score = 0;
}
void Draw() {
	
    system("cls");
    
    cout<<"########## SNAKE GAME ##########";
	cout << endl;
	cout<<"################################";
	cout << endl;
	cout<<"###########  ENJOY   ###########";
	cout << endl;
    
    for(int i = 0; i < width+2; i++)
    cout << "#";
    
    cout << endl ;
    
    for (int i = 0; i < height ; i++) {
    	
       for (int j = 0; j < width; j++) {
       	
          if (j == 0)
          cout << "#"; //walls
          
          if (i == y && j == x)
          cout << "@"; // snake tale
          
          else if (i == fruitY && j == fruitX )
          cout << "%"; // change it to change the fruit
          
          else {
                 bool print = false;
                 
                 for (int k = 0; k< nTail ; k++) {
                 	
                      if (tailX [k] == j && tailY [k] == i) {
                      	
                          cout << "*"; print = true;
                       }
                    }
                    
                 if (!print) 
				 cout << " ";
				 
                }
               if (j == width -1)
               cout << "#";
       }
       
       cout << endl;
    }
    
   for (int i = 0; i< width+2; i++)
   cout << "#";
   
   cout << endl;
   
   cout << "Score:" << score << endl ;
}
void DrawEnd(){
	system("cls");
	 cout<<"########## thanks for ##########";
	cout << endl;
	cout<<"############ playing ############";
	cout << endl;
	cout<<"########### YOUR SCORE IS :  "<< score;
	cout << endl;
	sleep(5);
}

void Input ()
{
   if (_kbhit ()) {  //get directions
   	
      switch (_getch ()) {
      	
         case 'a':
             dir = LEFT;
             break;
             
         case 'd':
             dir = RIGHT;
             break;
             
         case 'w':
             dir = UP;
             break;
             
         case 's':
             dir = DOWN ;
             break;
             
         case 'x':
             gameover = true;
             break;
        }
    }
}
void algorithm1()     //game logic 1
{
    int prevX = tailX [0];
    
    int prevY = tailY [0];
    
    int prev2X, prev2Y;
    
    tailX[0] = x;
    
    tailY[0] = y;
    
    for(int i = 1;i < nTail ; i++) {
    	
      prev2X = tailX[i];
      
      prev2Y = tailY[i];
      
      tailX[i] = prevX;
      
      tailY[i] = prevY;
      
      prevX = prev2X;
      
      prevY = prev2Y ;
    }
    switch (dir) {
    	
      case LEFT:
         x--;
         break;
         
      case RIGHT:
         x++;
         break;
         
      case UP:
         y--;
         break;
         
      case DOWN:
         y++;
         break;
         
      default:
         break;
         
    }
    
  
    if(x >= width || x == 0 || y >= height || y == 0 )
     gameover = true; 
    
    for (int i =0; i< nTail ;i++)
    if (tailX[i] == x && tailY[i] == y)
    gameover = true;
    
    if (x == fruitX && y == fruitY) {
       score +=15;
       
       fruitX = rand() % width;
       
       fruitY = rand() % height;
       
       nTail ++;
   }
   if(gameover == true){
   	DrawEnd();
   }
}

void algorithm2()         // game logic 2
{
    int prevX = tailX [0];
    
    int prevY = tailY [0];
    
    int prev2X, prev2Y;
    
    tailX[0] = x;
    
    tailY[0] = y;
    
    for(int i = 1;i < nTail ; i++) {
    	
      prev2X = tailX[i];
      
      prev2Y = tailY[i];
      
      tailX[i] = prevX;
      
      tailY[i] = prevY;
      
      prevX = prev2X;
      
      prevY = prev2Y ;
    }
    switch (dir) {
    	
      case LEFT:
         x--;
         break;
         
      case RIGHT:
         x++;
         break;
         
      case UP:
         y--;
         break;
         
      case DOWN:
         y++;
         break;
         
      default:
         break;
         
    }
    
    if (x >= width)
	 x =0;
	else if (x <0)
	 x = width -1;
    
     if (y >= height)
	  y = 0;
	 else if (y < 0)
	  y = height - 1; 
    
    for (int i =0; i< nTail ;i++)
    if (tailX[i] == x && tailY[i] == y)
    gameover = true;
    
    if (x == fruitX && y == fruitY) {
       score +=10;
       
       fruitX = rand() % width;
       
       fruitY = rand() % height;
       
       nTail ++;
   }
   if(gameover == true){
   	DrawEnd();
   }
}


int main()
{
	int choice;
	cout<< "enter 1 for simple level and 2 for hard level";
	cout << endl;
	cin >> choice;
	switch(choice)
	{
	case 1:  //simple level of the game
		
        Setup();
    
        while (!gameover)
	   {
    	
             Draw ();
      
             Input ();
     
             algorithm2 ();
         }
     
        break;
    
    case 2:  // hard level of the game
    	
    		 Setup();
    
        while (!gameover) {
    	
        Draw ();
      
        Input ();
     
        algorithm1 ();
        }
     
        break;
        
    default:
	  cout << "Invalid input";    
}
    return 0;
}