TIC-TAC-TOE Your task is to develop a tic-tac-toe game. There are two options for you to choose from. One option is a tic-tac-toe…

#include <iostream>
#include<string>
#include<cstdlib>

using namespace std;
char square[10] = {‘0′,’1′,’2′,’3′,’4′,’5′,’6′,’7′,’8′};
string name;
int splashScreen()//displays game and developer�s information
{
cout<<“Tic Tac Toe”<<endl;
cout<<“Developed by XXYYZZ”<< endl;
}
int askForUserNames()//requests for username
{

cout<<“Enter the player name:”<<endl;
getline (cin, name);
return 0;
}
int validateUserName(string name)//validate username
{
for (int i=0;i<name.length();i++)
{
if((name[i]>=’a’|| name[i]>=’A’)&&(name[i]<=’z’||name[i]<=’Z’))
{

}
else
{
return 0;

}
}
return 1;
}
int switchPlayer(int player)//switch from one player to another
{
player++;
return player%2;
}
int resetGame()//reset the game when one concludes; this includes filling the array with vales 0-8
{
for(int i=0;i<9;i++)
{
square[i]=(char)(i+48);
}
return 0;
}
int displayGrid()//display the grid after each player makes a move
{
cout << “Player 1 (“<<name<<“) – Player 2 (O)” << endl << endl;
cout << endl;

cout << ” | | ” << endl;
cout << ” ” << square[0] << ” | ” << square[1] << ” | ” << square[2] << endl;

cout << “_____|_____|_____” << endl;
cout << ” | | ” << endl;

cout << ” ” << square[3] << ” | ” << square[4] << ” | ” << square[5] << endl;

cout << “_____|_____|_____” << endl;
cout << ” | | ” << endl;

cout << ” ” << square[6] << ” | ” << square[7] << ” | ” << square[8] << endl;

cout << ” | | ” << endl << endl;

return 0;

}
int validatePlayersMove(int choice)//validates that user entry X is such that 0<=X<=8
{
if(choice>=0&&choice<=8)
{
return 1;
}
return 0;
}
int checkPositionAvailability(int choice)//check that the position selected by the user is available
{

if(square[choice]!=’O’&&square[choice]!=’X’)
{
return 1;
}
return 0;
}

int playerMakeMove()//prompts player to make a move, invokes validatePlayersMove, checkPositionAvailability
{
int choice;

while(1)
{
cout<<” Make a move: “<<endl;
cin>>choice;
if(validatePlayersMove(choice))
{
if(checkPositionAvailability(choice))
{

break;
}
else
{
cout<<“invalid move”;
}
}
else
cout<<“invalid move”;
}

char mark;

mark=’X’;

if (choice == 0 && square[0] == ‘0’)

square[0] = mark;
else if (choice == 1 && square[1] == ‘1’)

square[1] = mark;
else if (choice == 2 && square[2] == ‘2’)

square[2] = mark;
else if (choice == 3 && square[3] == ‘3’)

square[3] = mark;
else if (choice == 4 && square[4] == ‘4’)

square[4] = mark;
else if (choice == 5 && square[5] == ‘5’)

square[5] = mark;
else if (choice == 6 && square[6] == ‘6’)

square[6] = mark;
else if (choice == 7 && square[7] == ‘7’)

square[7] = mark;
else if (choice == 8 && square[8] == ‘8’)

square[8] = mark;

}

int checkWin()//check for a winning player
{
if (square[0] == square[1] && square[1] == square[2])

return 1;
else if (square[3] == square[4] && square[4] == square[5])

return 1;
else if (square[6] == square[7] && square[7] == square[8])

return 1;
else if (square[0] == square[3] && square[3] == square[6])

return 1;
else if (square[1] == square[4] && square[4] == square[7])

return 1;
else if (square[2] == square[5] && square[5] == square[8])

return 1;
else if (square[0] == square[4] && square[4] == square[8])

return 1;
else if (square[2] == square[4] && square[4] == square[6])

return 1;

else
return 0;
}
int checkTie()//check for a tie
{
if (square[1] != ‘1’ && square[2] != ‘2’ && square[3] != ‘3’
&& square[4] != ‘4’ && square[5] != ‘5’ && square[6] != ‘6’
&& square[7] != ‘7’ && square[8] != ‘8’ && square[0] != ‘0’)

return 1;
return 0;
}

int makeBestMove()//select best option
{

}
int computerMakeMove()//used to make the move, in other words populate the array
{
int choice;
do
{
choice=rand()%9;

if(square[choice]!=’X’&& square[choice]!=’O’)
{
break;
}

}
while(1);

char mark=’O’;

if (choice == 0 && square[0] == ‘0’)

square[0] = mark;
else if (choice == 1 && square[1] == ‘1’)

square[1] = mark;
else if (choice == 2 && square[2] == ‘2’)

square[2] = mark;
else if (choice == 3 && square[3] == ‘3’)

square[3] = mark;
else if (choice == 4 && square[4] == ‘4’)

square[4] = mark;
else if (choice == 5 && square[5] == ‘5’)

square[5] = mark;
else if (choice == 6 && square[6] == ‘6’)

square[6] = mark;
else if (choice == 7 && square[7] == ‘7’)

square[7] = mark;
else if (choice == 8 && square[8] == ‘8’)

square[8] = mark;

return 0;
}

int main()
{
int player=1;
splashScreen();
while(1)
{
askForUserNames();
if(validateUserName(name))
{
break;
}
else
cout<<“invalid name”<<endl;
}

displayGrid();
while(1)
{
if(player==1)
playerMakeMove();
else
computerMakeMove();
displayGrid();
if(checkWin())
{
if(player==1)
{
cout<<“Player “<<name<<” win”<<endl;

}
else
cout<<“Computer win”<<endl;
break;
}
else if(checkTie())
{
cout<<“tie”<<endl;
break;
}
player=switchPlayer(player);

}

return 0;
}

/////////////////////////////////////////////

outputs:

///////////////////////////////////////