Tic-Tac-Toe Game

#include<stdio.h>
#include<conio.h>
#include<windows.h>
void go(short x, short y) 
{
COORD pos = {x, y};
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), pos);
}
int arr();
void main()
{

//*to make square *//
int i,j,key;
int x=30,y=6,k=1,edgefor1corfor2=2,a,b,c,d,e,f,g=0,p,q;
char n;
for(j=0;j<3;j++)
{
go(24,0);
printf("TIC-TAC-TOE GAME");
go(24,1+3*j);
for(i=1;i<=13;i++)
printf("-");
go(24,2+j*3);
for(i=1;i<=4;i++)
printf("|   ");
go(24,3+j*3);
for(i=1;i<=4;i++)
printf("|   ");
}

//*square ends here*//

go(x,y);
printf("X");
sos:;


while(1)        //code for user i.e to know where it have put its 0//
{key=arr();
if(key==48 && key!=120)
break;
else
{if(key==72 && y>2)
y=y-4;
if(key==75 && x>26)
x=x-4;
if(key==77 && x<34)
x=x+4;
if(key==80 && y<10)
y=y+4;
go(x,y);
}

}
k=k+1;
switch(k)
{case 2:            // a and b are coordinates where our second X is placed //
if((x==26 && y==6) || (x==30 && y==10))
{edgefor1corfor2=1;
a=34;
b=2;}
if((x==30 && y==2) || (x==34 && y==6))
{edgefor1corfor2=1;
a=26;
b=10;}
if(x==26 && y==2)
{a=34;
b=10;}
if(x==34 && y==2)
{a=26;
b=10;}
if(x==26 && y==10)
{a=34;
b=2;
}
if(x==34 && y==10)
{a=26;
b=2;}
go(a,b);
printf("X");
c=x; //c and d are coordinates where user put 0 for the first time//
d=y;
goto sos;
break;


case 3:
if(edgefor1corfor2==1)   //edge case//
{
if(x+a==60 && y+b==12)  //case when user have put his 0 in order to break our line i.e.if(user have put his 0 at corner in our line// 	
{go(2*c-x,2*d-y);
printf("X");
goto sos;	}	
else            //case when user is fool and allow us to complete our line i.e.allow us to win...user is blind//
{go(60-a,12-b);
printf("X");
go(30,14);
printf("GAME WON");	}	
}


else    //corner case//	
{if((x==c && (y==d+4 || y==d-4))||(y==d && (x==c+4 || x==c-4) )) //if 2nd 0 is at edge adjacent to last o//see white copy last pages (mix copy)//
{go(2*x-c,2*y-d);
printf("X");
g=2; //to denote this case within corner case as it have to be used in case 4 //
p=2*x-c;
q=2*y-d;
goto sos;

}
if((x==a && y==d)||(x==c && y==b ))      //if 2nd 0 at any of 2 corners left
{go((x+c)/2,(y+d)/2);
printf("X");

g=1;  //to denote that within CORNER CASE //this case (if 2nd 0 at any of 2 corners// is denoted by g=1 //
p=(x+c)/2;
q=(y+d)/2;
goto sos;
}
else
{g=3;
if(a==2*x-a && d==2*y-b)
{go(b,c);
p=b; q=c;}
else
{go(a,d);
p=a; q=d;}
printf("X");
goto sos;

      //remaining case i.e.if 0 placed at edges but not adjacent ones//
}}
break;

case 4:
if(edgefor1corfor2==1) 
{if(a-c==8 || c-a==8)
{e=(a+c)/2;      ///e and f are coordinates of point which is between our two "X" on which if X comes we will won// 
f=b;}
if(b-d==8 || d-b==8)
{e=a;
f=(b+d)/2;}

if(x==e && y==f) //in case user put 0 at e,f coordinates then we will put X at other winning way i.e.by putting X at daigonal corner (this is done here by using 4 if statements below//
{if(b==f && e<a)
go(a,b+8);
if(b==f && e>a)
go(a,b-8);
if(b>f && e==a)
go(a+8,b);
if(b<f && e==a)
go(a-8,b);
printf("X");
go(30,14);
printf("GAME WON");
}
else
{
go(e,f);
printf("X");
go(30,14);
printf("GAME WON");}
}

//corner case........for case4//
else
{

if(g==1)   //case when in last step 0 was placed at corner instead of edge(adj. or non adj.).......within this there r 3 cases which can be done by only 1 pair of if else as shown//
{if(x==60-p && y==12-q)
go(2*x-a,2*y-b);
else
{go(60-p,12-q);
printf("X");
go(30,14);
printf("GAME WON ");
}
printf("X");
goto sos;
}

//within corner case if g==2(see case3) cases //
if(g==2 || g==3)
{if(x==(p+a)/2 && y==(q+b)/2) //if 0 placed between two X
{if(c==p && b==q)
go(a,d);
else
go(c,b);
printf("X");
go(30,14);
printf("game won");	}

else                      //if 0 placed anywhere else than above posn//
go((p+a)/2,(q+b)/2);		
printf("X");
go(30,14);
printf("game won ");
}
//within corner case g=3 case

} //corner case for case4 (switch) ends here//
break;

case 5:
	go(60-x,12-y);
	printf("X");
go(30,14);
printf("game is Draw.....IT HAPPENS>> Nothin so great");

}  //switch end here//
}

//main ends here
//* code for arrow reader function i.e.arr() *//
int arr()
{int ch;
ch = getch();
  if (ch == 0 || ch==224)
      ch = getch();
      else 
      printf("0");
   return (ch);
}