Erreur de compilation pour serpent

#include <graphics.h> 
#include <stdlib.h> 
#include <dos.h> 
#include <conio.h> 
#include <stdio.h> 
#include <time.h> 

check(); 
end(); 
win(); 
int m[500],n[500],con=20,TEMP; 
clock_t start,stop; 
 void main(void) 
{ 

int gd=DETECT,gm,ch,maxx,maxy,x=13,y=14,p,q,spd=100; 
int a=0,i=0,j,t,temp; 
initgraph(&gd,&gm,"..//bgi"); 

setcolor(WHITE); 
settextstyle(3,0,6); 
outtextxy(200,2,"  "); 
settextstyle(6,0,2); 
outtextxy(20,80," Use Arrow Keys To Direct The Snake "); 
outtextxy(20,140," Avoid The Head Of Snake Not To Hit Any Part Of Snake"); 
outtextxy(20,160," Pick The Beats Untill You Win The Game "); 
outtextxy(20,200," Press 'Esc' Anytime To Exit "); 
outtextxy(20,220," Press Any Key To Continue "); 

outtextxy(20,220," DONT FORGET TO GIVE U R VALUABLE OPINION "); 
ch=getch(); 
if(ch==27) exit(0); 
cleardevice(); 
maxx=getmaxx(); 
maxy=getmaxy(); 

randomize(); 

p=random(maxx); 
temp=p%13; 
p=p-temp; 
q=random(maxy); 
temp=q%14; 
q=q-temp; 



 start=clock(); 
 while(1) 
{ 

 setcolor(WHITE); 
 setfillstyle(SOLID_FILL,con+5); 
 circle(p,q,5); 
 floodfill(p,q,WHITE); 

   if( kbhit() ) 
   { 
     ch=getch(); if(ch==0) ch=getch(); 
     if(ch==72&& a!=2) a=1; 
     if(ch==80&& a!=1) a=2; 
     if(ch==75&& a!=4) a=3; 
     if(ch==77&& a!=3) a=4; 
      } 
       else 
     { 
     if(ch==27 
     ) break; 
     } 

       if(i<20){ 
     m[i]=x; 
     n[i]=y; 
     i++; 
        } 

   if(i>=20) 

   { 
     for(j=con;j>=0;j--){ 
      m[1+j]=m[j]; 
      n[1+j]=n[j]; 
       } 
     m[0]=x; 
     n[0]=y; 

     setcolor(WHITE); 
     setfillstyle(SOLID_FILL,con); 
     circle(m[0],n[0],8); 
     floodfill(m[0],n[0],WHITE); 

     setcolor(WHITE); 
     for(j=1;j<con;j++){ 
    setfillstyle(SOLID_FILL,con+j%3); 
     circle(m[j],n[j],5); 
     floodfill(m[j],n[j],WHITE); 
          } 
       delay(spd); 

    setcolor(BLACK); 
    setfillstyle(SOLID_FILL,BLACK); 
     circle(m[0],n[0],8); 
     floodfill(m[0],n[0],BLACK); 

     setcolor(BLACK); 
    setfillstyle(SOLID_FILL,BLACK); 
     circle(m[j],n[j],5); 
     floodfill(m[j],n[j],BLACK); 

     } 
     stop=clock(); 
     t=(stop-start)/CLK_TCK; 
     //printf(" TIME %d sec   ",t); 
     //printf("SCORE %d",con-5); 
     check(); 

    if(x==p&&y==q) { con=con+5; if(spd>=5) spd=spd-5; else spd=5; 
           if(con>490) win(); 
     p=random(maxx); temp=p%13;  p=p-temp; 
     q=random(maxy); temp=q%14;   q=q-temp; 
         } 
    if(a==1)  y =  y-14; if(y<0) { temp=maxy%14;y=maxy-temp;} 
    if(a==2)  y =  y+14; if(y>maxy) y=0; 
    if(a==3)  x =  x-13; if(x<0) { temp=maxx%13;x=maxx-temp;} 
    if(a==4)  x =  x+13; if(x>maxx) x=0; 
    if(a==0){  y = y+14 ;  x=x+13; } 
   } 

 } 


check(){ 
   int a; 
   for(a=1;a<con;a++) 

if(m[0]==m[a] && n[0]==n[a]) end(); 
   else continue; 

   } 
end() 

{ 

    int j,i; 
   setcolor(WHITE); 
   for(i=0;i<5;i++){ 
   delay(500); 
    cleardevice(); 
    delay(500); 
   for(j=0;j<=con;j++){ 
     setfillstyle(SOLID_FILL,RED); 
     circle(m[j],n[j],5); 
     floodfill(m[j],n[j],WHITE); 
    } 

   } 

    settextstyle(3,0,4); 
    outtextxy(150,150,"    GAME OVER "); 
    getch(); 
    getch(); 
    exit(0); 
    } 

win() 
{ 
int j,i; 
setcolor(WHITE); 
   for(i=0;i<5;i++){ 
   for(j=0;j<=con;j++){ 
     setfillstyle(SOLID_FILL,con); 
     circle(m[j],n[j],5); 
     floodfill(m[j],n[j],WHITE); 
    } 
    delay(500); 
    cleardevice(); 
    delay(500); 
   } 
  settextstyle(3,0,4); 
  outtextxy(210,320," YOU WIN "); 
  getch(); 
  exit(0); 
}