adding of 'tic tac toe' code

n/a

Author: anhobe01

index.c

@@ -0,0 +1,263 @@
+#include <stdio.h> 			// includes printf / scanf ; allows for inputs & outputs
+#include <stdlib.h> 		// includes random number generating functions
+#include <time.h>			// includes time() function ; seconds passed since 1970 
+
+#define side 3
+
+
+// Initializing functions (allows to call other functions within another function)
+
+
+	void CreateBoard();
+	void ShowInstruction();
+	void PlayerMove();
+	void ComputerMove();
+	void UpdateBoard();
+	int FreeSpacesLeft();
+	char checkWinner();
+	void ShowWinner(char winner);				
+
+
+// Global variables
+
+	
+	int PlayerScore, ComputerScore, Ties;
+	int GameNumber = 1;
+	int row, col;
+	char BoardArr[side][side];
+	char winner;
+	char PlayAgain = 'Y';
+	const char player = 'X';
+	const char computer = 'O';
+
+
+// Beginning of main-code function
+	
+	
+	int main()  {
+		
+		printf("\t\t   Welcome to Tic-Tac-Toe");
+		
+		do {	
+		
+			GameNumber = 1;					// resets # of wins for each plater and resets winner to '_' i.e. no winner. Occurs after each BO3 game
+			PlayerScore = 0;
+			ComputerScore = 0;
+			Ties = 0;				
+			
+			do {
+				
+				winner = '_';
+				CreateBoard();
+				ShowInstruction();
+				
+					while(winner == '_' && FreeSpacesLeft() != 0)  {
+						
+						PlayerMove();	
+						UpdateBoard();		
+						winner = checkWinner();
+						
+							if (winner != '_' || FreeSpacesLeft() ==0 ) {
+								
+								break;												// will break out of while loop; means there is either a winner or no spaces left i.e. a tie
+							}
+							
+						ComputerMove();
+						UpdateBoard();
+						winner = checkWinner();
+						if (winner != '_' || FreeSpacesLeft() ==0 )  {
+							winner = checkWinner();
+							break;
+						}									
+					}
+		
+					ShowWinner(winner);	
+					printf("       Total Wins");
+					printf("\n       --------");
+					printf("\nPlayer   : %d", PlayerScore);
+					printf("\nComputer : %d", ComputerScore);
+					printf("\nTies     : %d\n", Ties);
+					
+					GameNumber++;				
+
+			} while (GameNumber <= 3);						// will exit do-while loop once GameNumber == 3 (i.e. after 3 games as GameNumber increases by 1 per game)
+				
+				printf("\nWould you like to play again? Enter 'Y' for yes & to play again, enter 'N' for no & to exit program.\n");
+				printf("Selection: "); scanf("%s", &PlayAgain);			
+				
+				if (PlayerScore > ComputerScore)  {
+					printf("\nPlayer wins best of 3! Thanks for playing.\n");
+					
+				}
+				else  if (ComputerScore > PlayerScore)  {
+					printf("\nComputer wins best of 3! Better luck next time..\n");
+					
+				}
+				else if (ComputerScore == PlayerScore)  {
+					printf("\nIt's a tie! Player wins = Computer wins, close games!\n");
+					
+				}
+				
+			
+		} while(PlayAgain == 'Y');							//end of most outer do-while loop; exits program out when PlayAgain != 'Y'
+		
+			printf("\nClosing program, goodbye :( .");
+			return 0;
+		
+	}
+	
+	
+// List of functions begin here
+
+	void CreateBoard()  {
+		for (int i = 0; i < side; i++)  {
+			for (int j = 0; j < side; j++)  {
+				BoardArr[i][j] = '_' ;
+				
+			}
+		}
+	}
+	
+	
+	void ShowInstruction()  {
+		
+		printf("\n\t    3 games are played, best of 3 wins!");
+		printf("\n\n\t\t      Game number : %d\n\n", GameNumber);
+		printf("Please pick a number 1-9 as shown below to pick your play :\n\n");	
+		printf("\t\t\t 1 | 2 | 3 \n");
+		printf("\t\t\t ---------\n");					//				 col1   col2   col3	
+		printf("\t\t\t 4 | 5 | 6 \n");					//        row 1 [0][0] [0][1] [0][2]   ==   1  2  3
+		printf("\t\t\t --------- \n");					// note:  row 2 [1][0] [1][1] [1][2]   ==   4  5  6
+		printf("\t\t\t 7 | 8 | 9 \n");					//		  row 3 [2][0] [2][1] [2][2]   ==   7  8  9
+		printf("\n-\t-\t-\t-\t-\t-\t-\t-\t-\n");
+		printf("\t\t  Player = 'X' | CPU = 'O'\n");
+	}
+	
+ 
+	void PlayerMove()  {
+		
+		int SpaceChoice;
+				
+		do {
+			printf("\nEnter a number (1-9) to place"); 
+			printf("\nSelection : "); scanf("%d", &SpaceChoice);
+			
+			row = (SpaceChoice - 1) / 3;
+			col = (SpaceChoice - 1) % 3;
+		
+				if (BoardArr[row][col] != '_')  {
+					
+					printf("\nInvalid move, space already taken, please pick a different number.\n");
+				}	
+							
+				else {
+					
+					BoardArr[row][col] = player;
+					break;
+				}							
+		} while ( BoardArr[row][col] != '_' );
+	}
+	
+	
+	void ComputerMove()  {	
+		//creates a seed of random numbers based off time since code has been running
+		srand(time(0)); 
+		int ComputerPick;
+		
+		if (FreeSpacesLeft() > 0) {
+			
+			do  {
+				ComputerPick = ((rand() % 9) + 1 );     		//allows to randomly generated numbers between 1-9				
+					row = (ComputerPick - 1) / 3;		
+					col = (ComputerPick - 1) % 3;			//converts (1-9) to equivalent BoardArr mem. location
+				
+			} while( BoardArr[row][col] != '_');
+			BoardArr[row][col] = computer;
+		}		
+		else{
+			
+			ShowWinner('_'); 					// draw!
+		}		
+	}
+	
+
+	void UpdateBoard()  {
+		
+		printf("\t\t\t %c | %c | %c \n", BoardArr[0][0], BoardArr[0][1], BoardArr[0][2] );
+		printf("\t\t\t ---------\n");					
+		printf("\t\t\t %c | %c | %c \n", BoardArr[1][0], BoardArr[1][1], BoardArr[1][2] );				
+		printf("\t\t\t --------- \n");				
+		printf("\t\t\t %c | %c | %c \n", BoardArr[2][0], BoardArr[2][1], BoardArr[2][2] );
+		printf("\n-\t-\t-\t-\t-\t-\t-\t-\t-\n");
+	}
+	
+	
+	int FreeSpacesLeft() {
+	
+		int SpacesLeft = 9;
+			for (int i = 0; i < side; i++){
+				for ( int j = 0; j < side; j++) {
+					
+					if (BoardArr[i][j] != '_') {
+						SpacesLeft--;
+					}
+				}				
+			}
+		return SpacesLeft;	
+	}
+	
+	
+	char checkWinner()  {
+		
+		//checking rows for winner
+		
+		for (int i = 0; i < 3; i++)  {
+				
+			if (( BoardArr[i][0] == BoardArr[i][1] && BoardArr[i][0] == BoardArr[i][2] ) )  {
+				return BoardArr[i][0];
+				}							
+		}
+		
+		//checking columns for winner
+		
+		for (int i = 0; i < 3; i++)  {
+			
+			if ( (BoardArr[0][i] == BoardArr[1][i] && BoardArr[0][i] == BoardArr[2][i]) )  {
+				return BoardArr[0][i];
+				}
+		}	
+		
+		//checking diagonals for winner
+	
+		if ( (BoardArr[0][0] == BoardArr[1][1] && BoardArr[0][0] == BoardArr[2][2]) ) {		
+			return BoardArr[0][0];	
+		}
+		
+		if ( (BoardArr[2][0] == BoardArr[1][1] && BoardArr[2][0] == BoardArr[0][2]) ) {
+			
+			return BoardArr[2][0];	
+		}
+	
+		return winner = '_';							//No winner yet : Winner stays = '_' i.e. there is no winner yet, and the game continues
+		
+	}
+	
+	
+	void ShowWinner(char winner)  {
+
+			if (winner == player)  {
+				
+				printf("\nPlayer wins! Computer loses! :)\n\n");	
+				PlayerScore++;
+			}
+			else if (winner == computer)  {								
+				
+				printf("\nComputer wins! Player loses! :(\n\n");			// will print the winner after each match, and add 1 to their # of wins, resets every 3 matches played
+				ComputerScore++;
+			}
+			else  {
+				
+				printf("\nTie! No winner.\n\n");
+				Ties++;
+			}
+	}