#include<iostream.h>
#include<conio.h>
#include<stdlib.h>
#include<stdio.h>
#include<graphics.h>
#include<ctype.h>
#include<time.h>
void main()
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;
/* initialize graphics and local variables */
initgraph(&gdriver, &gmode, "");
 
cleardevice();
new_game:         //label to start new game;
int i,j;
char choice;
int count1=0,count2=0,count3=0;
char square[3][3];
struct game_var
{
int row_user,column_user,row_comp,column_comp;
char plyr,comp;
}game_variables;        //declaring game variables
 
settextstyle(3,0,20);   //setting font
 
for(i=0;i<3;i++)        //for1 loop to initialize all elements to space
{
 for(j=0;j<3;j++)
 {
  square[i][j]=' ';
 }
}  //end of for1loop
cout<<endl;
cout<<"Welcome To Tic Tac Toe"<<endl;
cout<<"Choose x or o"<<endl;
cin>>game_variables.plyr;
 
switch(game_variables.plyr)     //checking players choice
{
case 'x':game_variables.comp='o';
	 break;
case 'o':game_variables.comp='x';
	 break;
default :cout<<"Wrong Choice!!!! Starting Over..............";
	 goto new_game;
}//end of switch
cout<<"Generating board"<<endl;
for(i=0;i<3;i++)     //for2 loop to display empty board
{
 cout<<endl;
 cout<<"|";
 for(j=0;j<3;j++)
 {
  cout<<square[i][j]<<"|";
 }
}   //end of for2
cout<<endl;
user_input:
cout<<"Enter Row and Column(x and y Coordinates)"
    <<" That Are Greater Than 0 And Less Than 3"<<endl;
cout<<"Row = "<<endl;
cin>>game_variables.row_user;
cout<<"Column = "<<endl;
cin>>game_variables.column_user;
if(game_variables.row_user>3||game_variables.column_user>3||game_variables.row_user<0||game_variables.column_user<0)
{
 cout<<"Board Cannot Be Created, Starting Over............";
 goto user_input;
}
 
cout<<"Computers Turn............."<<endl;
if(square[game_variables.row_user][game_variables.column_user]==game_variables.plyr||square[game_variables.row_user][game_variables.column_user]==game_variables.comp)
{
 cout<<"Place Already Taken, Enter New Coordinates";
 goto user_input;
}
comp_start:
randomize();
game_variables.row_comp=random(1-0+1)+0;
game_variables.column_comp=random(1-0+1)+0;
if(square[game_variables.row_comp][game_variables.column_comp]==game_variables.plyr)
{
 goto comp_start;
}
 
square[game_variables.row_comp][game_variables.column_comp]=game_variables.comp;
square[game_variables.row_user][game_variables.column_user]=game_variables.plyr;
 
for(i=0;i<3;i++)     //for3 loop to display current board
 {
  cout<<endl;
  cout<<"|";
  for(j=0;j<3;j++)
  {
   cout<<square[i][j]<<"|";
  }
 }   //end of for3
cout<<endl;
for(i=0;i<3;i++)   //for4 to check the numbers of squares used
{
 for(j=0;j<3;j++)
 {
  if(square[i][j]==game_variables.plyr||square[i][j]==game_variables.comp)
  count1++;
 }
}                  //end of for4
 
for(i=0;i<3;i++)        //for5 checking winning conditions for diagonals
{
 for(j=0;j<3;j++)
 {
  if(i==j||i+j==2)
  {
   if(square[i][j]==game_variables.plyr)
   {
    count2++;
    if(count2<3)
    count2=0;
   }
   else if(square[i][j]==game_variables.comp)
   {
    count3++;
    if(count3<3)
    count3=0;
    }
  }         //end of if
 } //end of j
}   //end of for5
 
for(j=0;j<3;j++)
{
 if(square[0][j]==game_variables.plyr)		  //for user row
 count2++;
 else if(count2<3)
 count2=0;
 if(square[1][j]==game_variables.plyr)
 count2++;
 if(count2<3)
 count2=0;
 if(square[2][j]==game_variables.plyr)
 count2++;
 else if(count2<3)
 count2=0;
}
for(i=0;i<3;i++)
{
 if(square[i][0]==game_variables.plyr)		  //for user column
 count2++;
 else if(count2<3)
 count2=0;
 if(square[i][1]==game_variables.plyr)
 count2++;
 if(count3<=3)
 count2=0;
 if(square[i][2]==game_variables.plyr)
 count2++;
 else if(count2<3)
 count2=0;
}
 
for(j=0;j<3;j++)
{
 if(square[0][j]==game_variables.comp)		  //for comp row
 count3++;
 else if(count3<3)
 count3=0;
 if(square[1][j]==game_variables.comp)
 count3++;
 if(count2<3)
 count3=0;
 if(square[2][j]==game_variables.comp)
 count3++;
 else if(count3<3)
 count3=0;
}
 
for(i=0;i<3;i++)
{
 if(square[i][0]==game_variables.comp)		  //for comp comlumn
 count3++;
 else if(count3<3)
 count3=0;
 if(square[i][1]==game_variables.comp)
 count3++;
 if(count3<3)
 count3=0;
 if(square[i][2]==game_variables.comp)
 count3++;
 else if(count3<3)
 count3=0;
}
 
check:
if(count3==3)
{
 cout<<"Computer Has Won"<<endl;
 goto game;
}
else if(count2==3)
{
  cout<<"You have Won!! Congratulations"<<endl;getch();
  game:
  cout<<"Do You Want To Start A New Game y\n"<<endl;
  cin>>choice;
  switch(choice)
  {
   case 'y':goto new_game;
   case 'Y':goto new_game;
   case 'n':exit(0);
   case 'N':exit(0);
   } //end of switch
}
else if(count1<9&&count2<3&&count2<3)
goto user_input;
else if(count1==9&&count2<3&&count2<3 )
{
   cout<<"Draw Game, Do You Want Start New Game y\n"<<endl;
   cin>>choice;
   switch(choice)
   {
    case 'y':goto new_game;
    case 'Y':goto new_game;
    case 'n':exit(0);
    case 'N':exit(0);
    }
}
getch();
}