Help me to explain this program (turbo c - tic tac toe)

dyomzkie

Hi Guys,

just want to seek for your help regarding this program..
please put some comments or explainations..
just want to study this game cause i'm planning to make a game
similar to this and on my own..

would appreciate it alot..
thnaks..


TIC TAC TOE
C

#include
#include
#include
#include
int board[9],win=0;
int i;
int gdriver = DETECT, gmode;
init()
{
for(i=0;i<9;i++)
board[i]=1;
}

void main()
{
int x,y;
initgraph(&gdriver, &gmode, "");
clrscr();
init();
display();
while(1)
{
gotoxy(0,0);
coin(400,200,1);
outtextxy(415,200," Player");
coin(400,230,2);
outtextxy(415,230," System");
printf("

Enter your move (row/column) : ");
scanf("%d %d",&x,&y);
if (board[3*(x-1)+(y-1)]==1)
{
board[3*(x-1)+(y-1)]=3;
clrscr();
display();
check();
getch();
move();
clrscr();
display();
check();
if(win==-1)
{
settextstyle(5,0,4);
outtextxy(200,400,"MATCH DRAW");
break;
}
}
else
printf("
Move Not Allowed
");
}
getch();
}

coin(int x,int y,int s)
{
if(s==1)
{
setfillstyle(1,2);
fillellipse(x,y,10,10);
}
else
{
setfillstyle(1,14);
fillellipse(x,y,10,10);
}
}

display()
{
int l;
cleardevice();
outtextxy(220,10,"TIC TAC TOE");
outtextxy(370,300,"Designed By K.Shyam Srinivas");
outtextxy(370,320,"Email : seenu_4321@yahoo.co.in");
outtextxy(370,340,"Website : www.seenu.bravehost.com");
setbkcolor(0);
rectangle(199,199,351,351);
rectangle(196,196,354,354);

setfillstyle(8,4);
bar3d(200,200,250,250,0,0);
bar3d(300,200,350,250,0,0);
bar3d(250,250,300,300,0,0);
bar3d(200,300,250,350,0,0);
bar3d(300,300,350,350,0,0);

setfillstyle(8,1);
bar3d(250,200,300,250,0,0);
bar3d(200,250,250,300,0,0);
bar3d(300,250,350,300,0,0);
bar3d(250,300,300,350,0,0);

if (board[0]==3) coin(225,225,1);
if (board[0]==9) coin(225,225,2);
if (board[1]==3) coin(275,225,1);
if (board[1]==9) coin(275,225,2);
if (board[2]==3) coin(325,225,1);
if (board[2]==9) coin(325,225,2);

if (board[3]==3) coin(225,275,1);
if (board[3]==9) coin(225,275,2);
if (board[4]==3) coin(275,275,1);
if (board[4]==9) coin(275,275,2);
if (board[5]==3) coin(325,275,1);
if (board[5]==9) coin(325,275,2);

if (board[6]==3) coin(225,325,1);
if (board[6]==9) coin(225,325,2);
if (board[7]==3) coin(275,325,1);
if (board[7]==9) coin(275,325,2);
if (board[8]==3) coin(325,325,1);
if (board[8]==9) coin(325,325,2);

return;
}

move()
{
int maxrt=0,maxpos=-1,rt;
for(i=0;i<9;i++)
{
if(board[i]==1)
{
board[i]=9;
if(board[0]+board[1]+board[2]==27) win=2;
if(board[3]+board[4]+board[5]==27) win=2;
if(board[6]+board[7]+board[8]==27) win=2;
if(board[0]+board[3]+board[6]==27) win=2;
if(board[1]+board[4]+board[7]==27) win=2;
if(board[2]+board[5]+board[8]==27) win=2;
if(board[0]+board[4]+board[8]==27) win=2;
if(board[2]+board[4]+board[6]==27) win=2;
if (win!=2) board[i]=1;
else break;
}
}
if(win==2) return;
for(i=0;i<9;i++)
{
if(board[i]==1)
{
board[i]=3;
rt=rate();

if (maxrt<rt)
{
maxrt=rt;
maxpos=i;
}
board[i]=1;
}
}
if(maxpos==-1)
{
outtextxy(200,400,"MATCH DRAW");
win=-1;
}
else board[maxpos]=9;
}

int rate()
{
int rating=0;
if(board[0]+board[1]+board[2]==7) rating++;
if(board[0]+board[1]+board[2]==9) rating+=8;

if(board[3]+board[4]+board[5]==7) rating++;
if(board[3]+board[4]+board[5]==9) rating+=8;

if(board[6]+board[7]+board[8]==7) rating++;
if(board[6]+board[7]+board[8]==9) rating+=8;

if(board[0]+board[3]+board[6]==7) rating++;
if(board[0]+board[3]+board[6]==9) rating+=8;

if(board[1]+board[4]+board[7]==7) rating++;
if(board[1]+board[4]+board[7]==9) rating+=8;

if(board[2]+board[5]+board[8]==7) rating++;
if(board[2]+board[5]+board[8]==9) rating+=8;

if(board[0]+board[4]+board[8]==7) rating++;
if(board[0]+board[4]+board[8]==9) rating+=8;

if(board[2]+board[4]+board[6]==7) rating++;
if(board[2]+board[4]+board[6]==9) rating+=8;

return rating;
}


check()
{
if(board[0]+board[1]+board[2]==9) win=1;
if(board[3]+board[4]+board[5]==9) win=1;
if(board[6]+board[7]+board[8]==9) win=1;
if(board[0]+board[3]+board[6]==9) win=1;
if(board[1]+board[4]+board[7]==9) win=1;
if(board[2]+board[5]+board[8]==9) win=1;
if(board[0]+board[4]+board[8]==9) win=1;
if(board[2]+board[4]+board[6]==9) win=1;

if(board[0]+board[1]+board[2]==27) win=2;
if(board[3]+board[4]+board[5]==27) win=2;
if(board[6]+board[7]+board[8]==27) win=2;
if(board[0]+board[3]+board[6]==27) win=2;
if(board[1]+board[4]+board[7]==27) win=2;
if(board[2]+board[5]+board[8]==27) win=2;
if(board[0]+board[4]+board[8]==27) win=2;
if(board[2]+board[4]+board[6]==27) win=2;

if(win==1)
{
settextstyle(5,0,4);
outtextxy(200,400,"Player wins");
getch();
exit(0);
}
if(win==2)
{
settextstyle(5,0,4);
outtextxy(200,400,"System wins");
getch();
exit(0);
}
}