int x,y;
 
cout << "Enter coordinates for your X: ";
while(true) {
  cin >> x;
  if ((x>=3) || (x<0))
    cout<<endl<<"invalid move. try again with a number from 0 to 2: ";
  else break;
}

 
// This declares the integers.  Don't need to initialize them to 
// zero, because we fill them right away, and no decisions are made on them.
int x,y;
 
 
cout << "Enter coordinates for your X: ";
// note that since you are missing a \n, there will be no "return"
 
// while (true) means "loop forever unless we break out of it"
while (true)
     {
     cin >> x;
 
     // check to see if (X is greater or equal to 3)  OR  "||"  (X is less than 0)
     // this is the error check code.  The lines || mean OR
 
     cout << endl .......
 
     // the else "break" command means if you get here, break out of the while loop
 
     }

# include <iostream.h>
class TicTacToe
{
public:
 TicTacToe::TicTacToe(int array[][3]);//constructor
 void disp_array(void);
 void get_player1_move(int x1, int y1);
 void get_player2_move(int x2, int y2);
 int winner();
private:
int array[3][3];
};
//constructor
 TicTacToe::TicTacToe(int array[][3])
{
for (int i=0; i<3; i++) //loop array
for (int j=0; j<3; j++)
array[i][j]=0;
}
void TicTacToe::disp_array(void) //display board game
{
 cout<<"Tic-Tac-Toe Game"<<endl<<endl;
 array[3][3]=0;
for (int i=0; i<3; i++)
{
cout<<array[i][0]<<" | "<<array[i][1]<<" | "<<array[i][2];
if (i!=2)
{cout<<"\n---------\n";}
}
cout<<endl<<endl;
}
 
void TicTacToe:: get_player1_move(int x1, int y1)
{cout<<"Enter your coordinates player1: ";
 
cin>>x1;
x1--;
while(true) {
  if ((x1>=3) || (x1<0))
	cout<<endl<<"Invalid move. Try again with a number from 1 to 3: ";
  else break;}
cin>>y1;
y1--;
while(true) {
  if ((y1>=3) || (y1<0))
	cout<<endl<<"Invalid move. Try again with a number from 1 to 3: ";
  else break;}
array[x1][y1]=1;
get_player1_move();
 
}
void TicTacToe::get_player2_move(int x2, int y2)
{
cout<<"\nEnter your coordinates player2: ";
cin>>x2;
x2--;
while(true) {
  if ((x2>=3) || (x2<0))
	cout<<endl<<"Invalid move. Try again with a number from 1 to 3: ";
  else break;}
cin>>y2;
y2--;
while(true) {
  if ((y2>=3) || (y2<0))
	cout<<endl<<"Invalid move. Try again with a number from 1 to 3: ";
  else break;}
array[x2][y2]=2;
get_player2_move();
}
int TicTacToe:: winner(void); //see if there is a winner
{
int *p;
for (int t=0; t<3; t++) //rows
{p=&array[t][0];
if (*p==*(p+1) && *(p=1)==*(p+2))
return *p;
}
for(t=0; t<3; t++)//columns
{p=&array[0][t];
if (*p==*(p+3)  &&  *(p+3)==*(p+6))
return *p;
}
if(array[0][0]==array[1][1] && array[1][1]==array[2][2])//diagonal
return array[0][0];
if(array[0][2]==array[1][1] && array[1][1]==array[2][0])
return array[0][2];
}
 
int main()
{ int end;
 TicTacToe x;
 do {
  x.disp_array();
  x.get_player1_move();
  x.get_player2_move();
  x.winner();
 }
 while(end==0);
 if(end==1)
 {cout<<"player1 wins\n";}
 else
 {cout<<"player2 wins\n";}
 
 
return 0;
}