snake.cpp

#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,"C:\\Turboc3\\bgi");  
 snk.init();  
 snk.move();  
 closegraph();  
 restorecrtmode();  
 }