Creating an Advanced Tic-Tac-Toe game using C++

Hello, coders. Welcome to the codewithrandom blog. In this article, we will learn how to create an Advanced Tic-Tac-Toe game using C++.

Table of Contents

I’m sure you all must have played this game in your childhood but for those who might have not – Let us understand What exactly is the Tic Tac Toe game?

Tic Tac Toe is a two-player game in which the objective is to take turns and mark the correct spaces in a 3×3 (or larger) grid. It’s a fun game in which the two players combat each other using Xs and Os.

How to win the game?

Tic-tac-toe is a game in which two players, X and O, alternately fill the hash (#) shaped box (consisting of two vertical lines crossing two horizontal lines). The first person to fill the box with 3Xs or 3Os in a horizontal, vertical, or diagonal pattern wins the game. When none of the players succeeds in filling the boxes horizontally, vertically, or diagonally with 3Xs or 3Os, the game is declared a draw.

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=> In this project we will define functions, arrays and use control statements in C++ to create this fun project.

This is how Tic-tac-toe game looks in general-

Creating an Advanced Tic-Tac-Toe game using C++

We will be creating this kind of structure in C++ to play the Tic-Tac-Toe game

Creating an Advanced Tic-Tac-Tac game using C++ Source Code:-

You can directly use this code by copying it in your IDE to understand the working and then can create it by understanding the project.

#include<bits/stdc++.h>
#include<conio.h>
using namespace std;

void add(char a[3][3],char inp,char ch)
{
    int num=inp-49,row,col;
    row=num/3,col=num%3;
    a[row][col]=ch;
}

void disp(char a[3][3])
{
    cout<<"\n\t\tPress Esc anytime to quit the game\n\n\n\n";
    int i,j;
    for(i=0;i<3;i++)
    {
        cout<<"\t\t\t\t-------------\n\t\t\t\t";
        for(j=0;j<3;j++)
        {
            if(a[i][j]=='a') cout<<"|   ";
            else
                cout<<"| "<<a[i][j]<<" ";
        }
        cout<<"|"<<endl;
    }
    cout<<"\t\t\t\t-------------\n";
}

int check(char a[3][3],char inp)
{
    int num=inp-48,row,col;
    if(num<=0 || num>=10) return 0;
    num--;
    row=num/3;
    col=num%3;
    if(a[row][col]=='a') return 1;
    else return 0;
}

char gameover(char a[3][3])
{
    char winner='a';
    if(a[0][0]==a[0][1] && a[0][0]==a[0][2] && a[0][0]!='a') winner=a[0][0];
    if(a[1][0]==a[1][1] && a[1][0]==a[1][2] && a[1][0]!='a') winner=a[1][0];
    if(a[2][0]==a[2][1] && a[2][0]==a[2][2] && a[2][0]!='a') winner=a[2][0];
    if(a[0][0]==a[1][0] && a[0][0]==a[2][0] && a[0][0]!='a') winner=a[0][0];
    if(a[0][1]==a[1][1] && a[0][1]==a[2][1] && a[0][1]!='a') winner=a[0][1];
    if(a[0][2]==a[1][2] && a[0][2]==a[2][2] && a[0][2]!='a') winner=a[0][2];
    if(a[0][0]==a[1][1] && a[0][0]==a[2][2] && a[0][0]!='a') winner=a[0][0];
    if(a[0][2]==a[1][1] && a[0][2]==a[2][0] && a[0][2]!='a') winner=a[0][2];
    return winner;
}

int draw(char a[3][3])
{
    for(int i=0;i<3;i++)
        for(int j=0;j<3;j++)
            if(a[i][j]=='a')
                return 0;
    return 1;
}

int main()
{
    cout<<"\n\n\n\n\t\t\tTic Tac Toe\n\n\n\t\tPress any key to continue";
    getch();
    char a[3][3],turn[2]={'X','O'},ch='X',inp,winner,res;
    do
    {
        a[0][0]=a[0][1]=a[0][2]=a[1][0]=a[1][1]=a[1][2]=a[2][0]=a[2][1]=a[2][2]='a';
        system("cls");
        disp(a);
        cout<<"\n\n\t\t\t"<<ch<<"'s Turn\n\n";
        int count=0;
        while(1)
        {
            inp=getch();
            system("cls");
            if(inp<=48 || inp>=58 || !check(a,inp))
            {
                disp(a);
                cout<<"\n\n\t\t\t"<<ch<<"'s Turn\n\n";
                cout<<"INVALID MOVE!!\n\n";
            }
            else
            {
                add(a,inp,ch);
                disp(a);
                winner=gameover(a);
                if(winner=='a')
                {
                    if(draw(a))
                    {
                        cout<<"\n\n\t\t\tMatch Drawn !!\n";
                        break;
                    }
                    ch=turn[(++count)%2];
                    cout<<"\n\n\t\t\t"<<ch<<"'s Turn\n\n";
                }
                else
                {
                    cout<<"\n\n\t\t\t"<<winner<<" Won !!\n";
                    break;
                }
            }		
        }
        getch();
        system("cls");
        cout<<"\n\n\n\n\t\t\tWant to play more ? (Y/N) : ";
        cin>>res;
    }while(res=='y' || res=='Y');
}