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; else if (choice == 9 && square[9] == '9') square[9] = mark; else { cout<<"Invalid move "; player--; cin.ignore(); cin.get(); } i=checkwin(); player++; }while(i==-1); board(); if(i==1) cout<<"==>\aPlayer "<<--player<<" win "; else cout<<"==>\aGame draw"; cin.ignore(); cin.get(); return 0; } /********************************************* FUNCTION TO RETURN GAME STATUS 1 FOR GAME IS OVER WITH RESULT -1 FOR GAME IS IN PROGRESS O GAME IS OVER AND NO RESULT **********************************************/ int checkwin() { if (square[1] == square[2] && square[2] == square[3]) return 1; else if (square[4] == square[5] && square[5] == square[6]) return 1; else if (square[7] == square[8] && square[8] == square[9]) 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[3] == square[6] && square[6] == square[9]) return 1; else if (square[1] == square[5] && square[5] == square[9]) return 1; else if (square[3] == square[5] && square[5] == square[7]) return 1; else 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[9] != '9') return 0; else return -1; } /******************************************************************* FUNCTION TO DRAW BOARD OF TIC TAC TOE WITH PLAYERS MARK ********************************************************************/ void board() { system("cls"); cout << "\n\n\tTic Tac Toe\n\n"; cout << "Player 1 (X) - Player 2 (O)" << endl << endl; cout << endl; cout << " | | " << endl; cout << " " << square[1] << " | " << square[2] << " | " << square[3] << endl; cout << "_____|_____|_____" << endl; cout << " | | " << endl; cout << " " << square[4] << " | " << square[5] << " | " << square[6] << endl; cout << "_____|_____|_____" << endl; cout << " | | " << endl; cout << " " << square[7] << " | " << square[8] << " | " << square[9] << endl; cout << " | | " << endl << endl;