Registry SaveSetting/GetSetting Demonstration for beginners

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#include<iostream.h>
#include<conio.h>
#include<graphics.h>
#include<dos.h>
#include<stdlib.h>
#include<stdio.h>
#include<time.h>
#include<string.h>
void exit1();
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,RED);
 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(random(15)+1);
 settextstyle(2,0,3);
 outtextxy(e1,e2,"A");
 setcolor(x);
 egGen = 2;
}
void start()
{
cleardevice();
char m[100];
for(int i=200;i<=300;i=i+4)
	{
	cleardevice();
	for(int j=170;j<=470;j=j+3)
	{
	setcolor(RED);
	settextstyle(2,0,6);
	sprintf(m," INSTALLING : %d %",i-200);
	outtextxy(200,100,m);
	setfillstyle(7,i*j/2);
	bar(j,i,j,i);
	setcolor(8);
	settextstyle(10,0,4);
	outtextxy(75,220,"S N A K E G A M E");
	setcolor(random(15)+1);
	settextstyle(2,0,4);
	outtextxy(75,i,"VIVEK KUMAR SINGH");
	outtextxy(random(550),320,"ÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜ");
	delay(1);
	}
	}
	setcolor(RED);
	settextstyle(2,0,6);
	sprintf(m," PRESS ANY KEY TO CONTINUE .... ",0);
	outtextxy(200,300,m);

}
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,"d:\\TC\\BGI");
 start();
 getch();
 cleardevice();
 snk.init();
 snk.move();
  exit1();
 closegraph();
 restorecrtmode();
 }

 void exit1()
    {
    cleardevice();
    for(int i=100;i<=250;i++)
    {
    setcolor(9);
	settextstyle(10,0,4);
	outtextxy(50,220,"THANKS FOR PLAYING");
	setcolor(random(15)+1);
	settextstyle(2,0,4);
	outtextxy(random(550),320,"ÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜ");
	outtextxy(random(550),200,"ÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜÜ");
	delay(1);
    }
    }