SNAKE GAME

#include<iostream.h>
#include<conio.h>
#include<graphics.h>
#include<dos.h>
#include<stdlib.h>
#include<stdio.h>
#include<time.h>
#include<string.h>
class Snake
{
 int p1,p2,v1,v2,v3,e1,e2,prev,now,n,colr,dsp,cnt,dly,m;
 int stp,egGen;
 int xr,yr;
 void caught();
 public:
  long scr;
 int strtX,strtY,endX,endY;
 int pos[100][2];
 void show();
 void init();
 void egg();
 void transpose();
 void gnrtCond();
 void gnrtUnCond();
 void check();
 void checkEgg();
 void move();
 void chngDir();
 void sndEt();
 void sndCgt();
 int test();
 void score();
 Snake();
 Snake(Snake*);
 ~Snake();
 };
Snake::Snake()
 {
 }
Snake::~Snake()
{

}
void Snake::checkEgg()
{
 if((e1 == p1) && (e2 == p2))
 {sndEt();
  egg();
  dly--;
  score();
  n++;
  }
}
void Snake::sndEt()
{nosound();
 sound(2500);
 delay(2);
 nosound();
}
void Snake::sndCgt()
{nosound();
 for(int x=1000;x>0;x--)
 {sound(x);
  delay(1);
  }
 nosound();
}
void Snake::score()
{ char *p;

  ltoa(scr,p,10);
  settextstyle(8,0,1);
  setcolor(0);
  outtextxy(585,40,p);
  if(egGen != 1){
  scr = scr + dly / 10;
  }
  ltoa(scr,p,10);
  setcolor(10);
  outtextxy(585,40,p);

}
void Snake::gnrtCond()
{if(n < 367)
 {if(now == 8 && (prev != 8 && prev != 2))
  {pos[0][0] = p1;
   pos[0][1] = p2 - dsp;
   prev = now;
   }
  if(now == 4 && (prev != 4 && prev != 1))
  {pos[0][0] = p1 + dsp;
   pos[0][1] = p2;
   prev = now;
   }
  if(now == 2 && (prev != 8 && prev != 2))
  {pos[0][0] = p1;
   pos[0][1] = p2 + dsp;
   prev = now;
   }
  if(now == 1 && (prev != 1 && prev != 4))
  {pos[0][0] = p1 - dsp;
   pos[0][1] = p2;
   prev = now;
   }
}
}
void Snake::gnrtUnCond()
{
  if( prev == 8 )
  {pos[0][0] = p1;
   pos[0][1] = p2 - dsp;
   }
 if( prev == 4 )
  {pos[0][0] = p1 + dsp;
   pos[0][1] = p2;
   }
 if( prev == 2 )
  {pos[0][0] = p1;
   pos[0][1] = p2 + dsp;
   }
 if( prev == 1 )
  {pos[0][0] = p1 - dsp;
   pos[0][1] = p2;
   }
 p1 = pos[0][0];
 p2 = pos[0][1];
}
void Snake::check()
{
 if(p1 > endX)
  {p1 = strtX;}
 else if(p1 < strtX)
  {p1 = endX;}

 if(p2 > endY)
  {p2 = strtY;}
 else if(p2 < strtY)
  {p2 = endY;}

 pos[0][0] = p1;
 pos[0][1] = p2;
for(int i = 1;i < n;i++)
  { if(p1 == pos[i][0] && p2 == pos[i][1])
  {caught();
   break;
  }
 }
}
void Snake::show()
{
  int x = getcolor();
  if(egGen != 1)
  {
  setcolor(getbkcolor());
  setfillstyle(1,getbkcolor());
  fillellipse(v1,v2,yr,yr);
   }
  else
   egGen = 0;
  if(egGen == 2)
   egGen--;
  setcolor(colr);
  setfillstyle(1,9);
  if(now == 8 || now == 2)
   fillellipse(pos[0][0],pos[0][1],xr,yr);
  else if(now == 4 || now == 1)
   fillellipse(pos[0][0],pos[0][1],yr,xr);
  setcolor(x);
}
void Snake::transpose()
{ int i,j,x,y;
   p1 = pos[0][0];
   p2 = pos[0][1];
   if(!egGen){
   v1 = pos[n-1][0];
   v2 = pos[n-1][1];
   }
   else
    egGen = 0;
   for(i = n-1;i >= 1;i--)
   {pos[i][0] = pos[i-1][0];
    pos[i][1] = pos[i-1][1];
   }
}
void Snake::move()
{ int st = 0;
  do{
   if(!kbhit())
   {checkEgg();
    if(!st)
     show();
    else
     st = 0;
    delay(dly/4);
    transpose();
    delay(dly/4);
    gnrtUnCond();
    delay(dly/4);
    check();
   delay(dly/4);
    }
   else if(stp){
   chngDir();
   gnrtCond();
   check();
   show();
   st = 1;
   }
   }while(stp);
}
void Snake::init()
{time_t tm;
 srand(time(&tm));
 dsp = 20;
 n = 5;
 prev = 4;
 for(int i = 4;i >= 0;i--)
 {pos[i][0] = 201 + (n - i - 1) * dsp;
  pos[i][1] = 301;
  }
  strtX = 21;
  strtY = 21;
  endX = 481;
  endY = 361;
  colr = 14;
  now = prev;
  dsp = 20;
  stp = 111;
  cnt = -1;
  scr = 0;
  dly = 150;
   xr = 3;
   yr = 9;
  egg();
  egGen = 1;
  score();
  int x = getcolor();
  setlinestyle(0,1,3);
  setcolor(15);
  rectangle(strtX-15,strtY-15,endX+15,endY+15);
  rectangle(endX+25,strtY-15,getmaxx()-15,endY+15);
  rectangle(strtX-15,endY+25,getmaxx()-15,getmaxy()-5);
  line(endX+25,strtY+75,getmaxx()-15,strtY+75);
  line(endX+25,strtY+200,getmaxx()-15,strtY+200);
  line(endX+25,strtY+275,getmaxx()-15,strtY+275);
  setlinestyle(0,1,1);
  settextstyle(8,0,1);
  setcolor(11);
  outtextxy(514,40,"SCORE");
  setcolor(14);
  settextstyle(11,0,5);
  outtextxy(524,110," CONTROLS ");
  outtextxy(522,135,"p = PAUSE");
  outtextxy(522,155,"g = RESUME");
  outtextxy(522,175,"e = EXIT");
  outtextxy(513,195,"ARROWS");
  outtextxy(512,205,"    -MOVEMENT");
  setcolor(14);
  settextstyle(4,0,9);
  outtextxy(getmaxx()-500,getmaxy()-110,"SNAKE");
  settextstyle(8,0,1);
  setcolor(x);
}
void Snake::caught()
{
 stp = 0;
 sndCgt();
for(int i=0;i<=7;i++)
 {if(i%2)
  {setcolor(10);
   outtextxy(512,250,"GAME OVER");
   delay(900);
   }
  else
  {setcolor(0);
   outtextxy(512,250,"GAME OVER");
   delay(500);
  }
  }
sleep(1);
}
void Snake::chngDir()
{int clr;
 fillsettingstype *p;
 char x = getch();
 if(x == 72)
  now = 8;
 else if(x == 77)
  now = 4;
 else if(x == 80)
  now = 2;
 else if(x == 75)
  now = 1;
 else if(x == 'e')
  caught();
 else if(x == 'p')
 {//int y = getcolor();
  int twnkl = 1;
  settextstyle(11,0,9);
  while(1)
  {if(kbhit())
   {int c = getch();
    if(c == 'g')
    {clr = getcolor();
     setcolor(0);
     rectangle(endX+40,endY-10,getmaxx()-35,getmaxy()-160);
     outtextxy(endX+60,endY-29,"PAUSE");
     break;
     }
    }
   else
   {if(twnkl%2)
    {clr = getcolor();
     setcolor(10);
     rectangle(endX+40,endY-10,getmaxx()-35,getmaxy()-160);
     outtextxy(endX+60,endY-29,"PAUSE");
     setcolor(clr);
      delay(1000);
     }
    else
    {
     clr = getcolor();
     setcolor(0);
     rectangle(endX+40,endY-10,getmaxx()-35,getmaxy()-160);
     outtextxy(endX+60,endY-29,"PAUSE");
     delay(1000);
    }
   }
   twnkl++;
  }
    settextstyle(8,0,1);
 }
}
Snake::Snake(Snake *p)
{
 *p=NULL;
}
void Snake::egg()
{ do
  {e1 = (rand() % 100) * dsp + strtX;
   e2 = (rand() % 100) * dsp + strtY;
   }while(test());
  int x = getcolor();
  setcolor(7);
  setfillstyle(1,random(15)+1);
  fillellipse(e1,e2,xr+2,xr+2);
  setcolor(x);
  egGen = 2;
}
int Snake::test()
{ for(int i=0;i<n;i++)
  {if(e1 == pos[i][0] && e2 == pos[i][1])
    break;
   if(v1 == e1 && v2 == e2)
    break;
   if((e1 >= endX+1) || (e2 >= endY+1))
    break;
   }
 if(i != n)
  return 1;
 else
  return 0;
}

void main()
{Snake snk;
 int gd=DETECT,gm,i,j,k,x,y;
 clrscr();
 initgraph(&gd,&gm,"E:\Turboc3");
 snk.init();
 snk.move();

 closegraph();
 restorecrtmode();
 }