This is the tic tac toe game made using the C++ programming language. The game has the option to play as 1 or 2 players.
The game has a score feature, which keeps on increasing with wins. Also, the game features a menu for easy transition from one option to another.
Here is the source code of the Tic Tac Toe game in C++:
#include <iostream>
#include<list>
#include <cstdlib>
#include<string>
#include <ctime>
using namespace std;
typedef struct{
int *row;
}WinList;
class Player {
private:
string name;
int score;
public:
Player() :Player {""}{}
Player(string n) :score{0}, name{n}{}
void won(){
//increment the score
score++;
}
int getScore(){ return this->score;}
string getName(){ return this->name;}
};
class Game {
private:
char board[9];
int emptyIndex[9];
int gameOn, againstComputer;
int emptyCount;
WinList winlist[8];
void displayBoard(){
cout <<endl;
cout << " | | "<<endl;
cout << " "<< board[0] <<" | "<<board[1]<<" | "<<board[2]<<endl;
cout << " | | "<<endl;
cout << "-----------"<<endl;
cout << " | | "<<endl;
cout << " "<< board[3] <<" | "<<board[4]<<" | "<<board[5]<<endl;
cout << " | | "<<endl;
cout << "-----------"<<endl;
cout << " | | "<<endl;
cout << " "<< board[6] <<" | "<<board[7]<<" | "<<board[8]<<endl;
cout << " | | "<<endl;
cout <<endl;
}
void computerInput(){
int pos;
pos = rand()%10;
if(emptyIndex[pos] == 1){
if(emptyCount < 0)
return;
computerInput();
} else {
cout<< "Computer choose: " << pos+1 << endl;
emptyIndex[pos] =1;
emptyCount-=1;
board[pos] = 'O';
}
}
void playerInput(Player &player){
int pos;
cout << endl;
cout << "\t" << player.getName() <<" Turn: ";
cout <<"\t Enter the position " << endl;
cin >> pos;
pos -=1;
if(emptyIndex[pos] == 1){
cout << "-----Position not empty-------"<< endl;
playerInput(player);
} else {
emptyIndex[pos] =1;
emptyCount-=1;
player.getName().compare("Player I") == 0 ? board[pos] ='X': board[pos] ='O';
}
}
void checkWin(Player &p1,Player &p2){
int i,j,k;
bool flag = false;
char first_symbol;
for(i=0; i<8; i++){
first_symbol = board[winlist[i].row[0]];
if((first_symbol != 'X') && (first_symbol != 'O')){
flag = false;
continue;
}
flag = true;
for(j=0;j<3;j++){
if(first_symbol != board[winlist[i].row[j]]){
flag = false;
break;
}
}
if(flag){
gameOn = 0;
if(first_symbol == 'X'){
cout << "-----------------------"<< endl;
cout << "\t Player I WON"<< endl;
cout << "-----------------------"<< endl;
p1.won();
} else {
p2.won();
if(againstComputer){
cout << "-----------------------"<< endl;
cout << "\t Computer WON"<< endl;
cout << "-----------------------"<< endl;
} else {
cout << "-----------------------"<< endl;
cout << "\t Player II WON"<< endl;
cout << "-----------------------"<< endl;
}
}
displayScore(p1,p2);
break;
}
}
}
void play(Player &p1,Player &p2){
char rematch ='\0';
int hand = 0;
gameOn =1;
displayBoard();
while((emptyCount > 0) && (gameOn != 0)){
if(againstComputer)
hand == 1 ? computerInput(): playerInput(p2);
else
hand == 1 ? playerInput(p1): playerInput(p2);
hand= !hand;
displayBoard();
checkWin(p1,p2);
}
if (emptyCount <=0){
cout << " -----------------------"<< endl;
cout << "\t No WINNER"<< endl;
cout << " -----------------------"<< endl;
}
cout<< endl;
cout << "Rematch Y/N: ";
cin >> rematch;
if((rematch == 'Y')||(rematch == 'y')){
init();
play(p1,p2);
}
}
void displayScore(Player &p1, Player &p2){
cout << endl;
cout << "\t SCORE: \t";
if(againstComputer)
cout<<" Player I: " <<p1.getScore()<<" \t Computer: "<<p2.getScore()<< endl;
else
cout<<" Player I: " <<p1.getScore()<<" \t Player II: "<<p2.getScore()<< endl;
}
public:
Game(): emptyCount{0}, gameOn{1}, againstComputer{0}{
init();
winlist[0].row = new int[3]{0,1,2};
winlist[1].row = new int[3]{3,4,5};
winlist[2].row = new int[3]{6,7,8};
winlist[3].row = new int[3]{0,3,6};
winlist[4].row = new int[3]{1,4,7};
winlist[5].row = new int[3]{2,5,8};
winlist[6].row = new int[3]{0,4,8};
winlist[7].row = new int[3]{2,4,6};
}
void init(){
gameOn = 1;
emptyCount =0;
srand(time(0));
for(size_t i=0; i<10; i++){
emptyIndex[i] = 0;
board[i] = (i+1) +'0';
emptyCount++;
}
emptyCount--;
}
void onePlayerGame(){
//Creating Player
Player p("Player I");
Player c("Computer");
cout << " -----------------------"<< endl;
cout << "\t Player I: X \t Computer: O"<< endl;
cout << " -----------------------"<< endl;
cout << endl;
againstComputer = 1;
play(c,p);
}
void twoPlayerGame(){
//Creating Player
Player p("Player I");
Player c("Player II");
cout << " -----------------------"<< endl;
cout << "\t Player I: X \t Player II: O"<< endl;
cout << " -----------------------"<< endl;
cout << endl;
againstComputer = 0;
play(c,p);
}
};
int main()
{
int ch;
while(1){
cout<< " ----------MENU----------" << endl;
cout << "\t 1. 1 Player game" <<endl;
cout << "\t 2. 2 Player game" <<endl;
cout << "\t 3. To exit " <<endl;
cout <<" ------------------------" << endl;
cout << endl;
cout <<"\t Select an option" << endl;
cin >> ch;
switch(ch){
case 1:{
Game *game = new Game;
game->init();
game->onePlayerGame();
}
break;
case 2:{
Game *game = new Game;
game->init();
game->twoPlayerGame();
}
break;
case 3:
return 0;
default:
cout << "OOPs Invalid Option! TRY AGAIN";
}
}
return 0;
}Running the Game:
The C++ program has two classes Player and Game. We create instances of these classes depending on the user choice.
Player class is used to create a player object which has a separate score, whereas the Game class has various member methods that run the game.
In 1 player game, the player plays against the computer.
To implement this functionality, we select a random number from 1 to 9 and check if that particular position is empty. If so, we select that position on the board for the computer, else we repeat the process of generating a random number to continue the game.
That's all for the tic tac toe game code in C++. If the code doesn't work for you or you have any problem then comment below.