Errors in my Tic-Tac-Toe Game - c

Here's my code for my tic-tac-toe game:
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
int board[3][3] = {
{0, 0, 0},
{0, 0, 0},
{0, 0, 0}
};
int main (void)
{
int const user1 = 1;
int const user2 = 2;
char move[10];
while (! all_locations_filled()) {
printf("User-1, please enter your move:");
scanf("%s", move);
if(valid_location(move)) {
mark_location(user1, move);
display_board(board[3][3]);
}
else if(won_the_game(user1)) {
printf("Congratulations User-1, You Won the Game!");
break;
}
else {
printf("Invalid Move");
}
printf("User-2, please enter your move:");
scanf("%s", move);
if(valid_location(move)) {
mark_location(user2, move);
display_board();
}
else if(won_the_game(user2) {
printf("Congratulations User-2, You Won the Game!");
break;
}
else {
printf("Invalid Move");
}
}
return 0;
}
bool valid_location(char str[10]) {
int strcmp(x, y);
if (strcmp(str[10], "upperLeft") == 0 || strcmp(str[10], "up") == 0 || strcmp(str[10], "upperRight") == 0 || strcmp(str[10], "left") == 0 || strcmp(str[10], "center") == 0 || strcmp(str[10], "right") == 0 || strcmp(str[10], "lowerLeft") == 0 || strcmp(str[10], "down") == 0 || strcmp(str[10], "lowerRight") == 0)
return true;
}
void mark_location(int userU, char str[10]) {
int strcmp(x, y);
if (strcmp(str[10], "upperLeft") == 0)
board[0][0] = userU;
else if (strcmp(str[10], "up") == 0)
board[0][1] = userU;
else if (strcmp(str[10], "upperRight") == 0)
board[0][2] = userU;
else if (strcmp(str[10], "left") == 0)
board[1][0] = userU;
else if (strcmp(str[10], "center") == 0)
board[1][1] = userU;
else if (strcmp(str[10], "right") == 0)
board[1][2] = userU;
else if (strcmp(str[10], "lowerLeft") == 0)
board[2][0] = userU;
else if (strcmp(str[10], "down") == 0)
board[2][1] = userU;
else if (strcmp(str[10], "lowerRight") == 0)
board [2][2] = userU;
}
char display_board(int array[][]) {
int i, j;
for (i=0; i<3; ++i)
for (j=0; j<3; ++j)
if (array[i][j] == 0)
print("-");
else if (array[i][j] == 1)
print("x");
else if (array[i][j] == 2)
print("o");
}
bool all_locations_filled() {
int i, j;
for (i=0; i<3; ++i)
for (j=0; j<3; ++j)
if board[i][j] == 0
return false;
return true;
}
bool won_the_game(userU) {
int i, j;
if (board[0][0] == userU && board[0][1] == userU && board[0][2] == userU)
return true;
else if (board[1][0] == userU && board[1][1] == userU && board[1][2] == userU)
return true;
else if (board[2][0] == userU && board[2][1] == userU && board[2][2] == userU)
return true;
else if (board[0][0] == userU && board[1][0] == userU && board[2][0] == userU)
return true;
else if (board[0][1] == userU && board[1][1] == userU && board[2][1] == userU)
return true;
else if (board[0][2] == userU && board[1][2] == userU && board[2][2] == userU)
return true;
else if (board[0][0] == userU && board[1][1] == userU && board[2][2] == userU)
return true;
else if (board[2][2] == userU && board[1][1] == userU && board[2][0] == userU)
return true;
else
return false;
}
There are a few errors that I don't understand, here they are:
tictactoe.c:50: error: expected expression before ‘}’ token
This error is at the end of the main function but I'm not sure what I did wrong.
tictactoe.c:52: error: nested functions are disabled, use -fnested-functions to re-enable
I didn't know I used a nested function.
tictactoe.c:53: warning: parameter names (without types) in function declaration
This is referring to int strcmp(x, y)
tictactoe.c:55: warning: passing argument 1 of ‘strcmp’ makes pointer from integer without a cast
What did I do wrong with strcmp?
If someone could help me out I'd greatly appreciate it.

You're missing a closing parenthesis here (line #40):
else if(won_the_game(user2) {
Should be:
else if(won_the_game(user2)) {

You have a couple or problems with the strcmp as well.
strcmp(str[10], "upperRight")
The compiler is complaining about the first parameter str[10]. One problem is that this selects a single character from the string, and not the whole string. Another problem is that in an array of size 10, the positions are numbered 0..9 so there isn't even a position 10!
Also, a string literal like "upperRight" contains 10 visible characters plus an extra zero character as a terminator. So it needs 11 positions when stored in the str.

Related

Some Errors in my X and O game ( C language)

What I'm trying to do here is a tie toe game, but when my code enters the do - while part, it ends the process by itself. Since I could not solve this part, I did not have a chance to try whether there are other problems with the code, unfortunately, I would be glad if you could help with this issue.
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
char box_area[] = { '0','1','2','3','4','5','6','7','8','9' };
struct Player {
bool turn;
char mark;
int ID;
};
int main()
{
int return_result;
int player_number;
struct Player player1;
struct Player player2;
struct Player users[2];
users[0] = player1;
users[1] = player2;
(player1.mark = 'X') && (player2.mark = 'O');
(player1.turn = true) && (player2.turn = false);
(player1.ID = 1) && (player2.ID = 2);
do
{
box_creat();
for (int i = 0; i < 2; i++) {
if (users[i].turn == true)
{
make_move(users[i].ID);
box_creat();
users[i].turn = false;
users[i + 1].turn = true; \\ I made the logic of this section wrong
\\I will try to fix it, I realized after I sent the question
}
}
return_result = check_the_winner();
} while (return_result == 1 || return_result == -1);
return 0;
}
void box_creat(void) {
printf("| %c | %c | %c |", box_area[0], box_area[1], box_area[2]);
printf("\n\n");
printf("| %c | %c | %c |", box_area[3], box_area[4], box_area[5]);
printf("\n\n");
printf("| %c | %c | %c |", box_area[6], box_area[7], box_area[8]);
}
void make_move(int Player_ID)
{
int choice;
printf("Please select a area between 0-9 ");
scanf("%d", choice);
if (choice == '0' && box_area[0] == '0')
{
if (Player_ID == 1) {
box_area[0] = 'X';
}
else {
box_area[0] = 'O';
}
}
else if (choice == '1' && box_area[1] == '1')
{
if (Player_ID == 1) {
box_area[1] = 'X';
}
else {
box_area[1] = 'O';
}
}
else if (choice == '2' && box_area[2] == '2')
{
if (Player_ID == 1) {
box_area[2] = 'X';
}
else {
box_area[2] = 'O';
}
}
else if (choice == '3' && box_area[3] == '0')
{
if (Player_ID == 1) {
box_area[3] = 'X';
}
else {
box_area[3] = 'O';
}
}
else if (choice == '4' && box_area[4] == '0')
{
if (Player_ID == 1) {
box_area[4] = 'X';
}
else {
box_area[4] = 'O';
}
}
else if (choice == '5' && box_area[5] == '0')
{
if (Player_ID == 1) {
box_area[5] = 'X';
}
else {
box_area[5] = 'O';
}
}
else if (choice == '6' && box_area[6] == '0')
{
if (Player_ID == 1) {
box_area[6] = 'X';
}
else {
box_area[6] = 'O';
}
}
else if (choice == '7' && box_area[7] == '0')
{
if (Player_ID == 1) {
box_area[7] = 'X';
}
else {
box_area[7] = 'O';
}
}
else if (choice == '8' && box_area[8] == '0')
{
if (Player_ID == 1) {
box_area[8] = 'X';
}
else {
box_area[8] = 'O';
}
}
}
int check_the_winner(void)
{
if (box_area[0] && box_area[1] && box_area[2] == 'X' || 'O') {
return 1;
}
else if(box_area[3] && box_area[4] && box_area[5] == 'X' || 'O') {
return 1;
}
else if (box_area[6] && box_area[7] && box_area[8] == 'X' || 'O') {
return 1;
}
else if (box_area[2] && box_area[4] && box_area[6] == 'X' || 'O') {
return 1;
}
else if (box_area[0] && box_area[3] && box_area[6] == 'X' || 'O') {
return 1;
}
else if (box_area[2] && box_area[8] && box_area[5] == 'X' || 'O') {
return 1;
}
else if (box_area[0] && box_area[4] && box_area[8] == 'X' || 'O') {
return 1;
}
else if (box_area[1] && box_area[4] && box_area[7] == 'X' || 'O') {
return 1;
}
else {
return -1;
}
}
I tried out your program and found a few glitches that needed revision as well as adding in some additional bits of code just to neaten things up a bit. Following is your code with those revisions.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
char box_area[] = { '0','1','2','3','4','5','6','7','8','9' };
struct Player
{
bool turn;
char mark;
int ID;
};
void box_creat(void)
{
printf("| %c | %c | %c |", box_area[0], box_area[1], box_area[2]);
printf("\n\n");
printf("| %c | %c | %c |", box_area[3], box_area[4], box_area[5]);
printf("\n\n");
printf("| %c | %c | %c |", box_area[6], box_area[7], box_area[8]);
printf("\n"); /* Added for aesthetics */
}
void make_move(int Player_ID)
{
int choice;
printf("Player %d - please select a area between 0-9 ", Player_ID);
scanf("%d", &choice); /* Corrected missing ampersand */
printf("Player: %d makes a move\n", Player_ID);
if (choice == 0 && box_area[0] == '0') /* FYI - '0' is equivalent to integer value 48 */
{
if (Player_ID == 1)
{
box_area[0] = 'X';
}
else
{
box_area[0] = 'O';
}
}
else if (choice == 1 && box_area[1] == '1')
{
if (Player_ID == 1)
{
box_area[1] = 'X';
}
else
{
box_area[1] = 'O';
}
}
else if (choice == 2 && box_area[2] == '2')
{
if (Player_ID == 1)
{
box_area[2] = 'X';
}
else
{
box_area[2] = 'O';
}
}
else if (choice == 3 && box_area[3] == '3')
{
if (Player_ID == 1)
{
box_area[3] = 'X';
}
else
{
box_area[3] = 'O';
}
}
else if (choice == 4 && box_area[4] == '4')
{
if (Player_ID == 1)
{
box_area[4] = 'X';
}
else
{
box_area[4] = 'O';
}
}
else if (choice == 5 && box_area[5] == '5')
{
if (Player_ID == 1)
{
box_area[5] = 'X';
}
else
{
box_area[5] = 'O';
}
}
else if (choice == 6 && box_area[6] == '6')
{
if (Player_ID == 1)
{
box_area[6] = 'X';
}
else
{
box_area[6] = 'O';
}
}
else if (choice == 7 && box_area[7] == '7')
{
if (Player_ID == 1)
{
box_area[7] = 'X';
}
else
{
box_area[7] = 'O';
}
}
else if (choice == 8 && box_area[8] == '8')
{
if (Player_ID == 1)
{
box_area[8] = 'X';
}
else
{
box_area[8] = 'O';
}
}
}
int check_the_winner(void)
{
if ((box_area[0] == box_area[1]) && (box_area[1] == box_area[2]) && (box_area[0] != '0')) /* Corrected the testing for proper "and" conditioning */
{
return 1;
}
else if ((box_area[3] == box_area[4]) && (box_area[4] == box_area[5]) && (box_area[3] != '3'))
{
return 1;
}
else if ((box_area[6] == box_area[7]) && (box_area[7] == box_area[8]) && (box_area[6] != '6'))
{
return 1;
}
else if ((box_area[2] == box_area[4]) && (box_area[4] == box_area[6]) && (box_area[2] != '2'))
{
return 1;
}
else if ((box_area[0] == box_area[3]) && (box_area[3] == box_area[6]) && (box_area[0] != '0'))
{
return 1;
}
else if ((box_area[2] == box_area[5]) && (box_area[5] == box_area[8]) && (box_area[2] != '2'))
{
return 1;
}
else if ((box_area[0] == box_area[4]) && (box_area[4] == box_area[8]) && (box_area[4] != '4'))
{
return 1;
}
else if ((box_area[1] == box_area[4]) && (box_area[4] == box_area[7]) && (box_area[1] != '1'))
{
return 1;
}
else
{
return -1;
}
}
int main()
{
int return_result;
//int player_number; /* Compiler said that this wasn't being used */
int swap = 1;
int i;
struct Player player1;
struct Player player2;
struct Player *users[2]; /* Used these as address pointers to player "1" and player "2" */
users[0] = &player1; /* Before making these pointers, the users array just contained copies of the player structures */
users[1] = &player2;
(player1.mark = 'X') && (player2.mark = 'O');
(player1.turn = true) && (player2.turn = false);
(player1.ID = 1) && (player2.ID = 2);
do
{
box_creat();
swap += 1;
i = swap % 2;
if (i == 1)
{
make_move(users[1]->ID);
//box_creat(); /* Being performed at the top of the loop */
users[0]->turn = false;
users[1]->turn = true;
}
else
{
make_move(users[0]->ID);
//box_creat();
users[1]->turn = false;
users[0]->turn = true;
}
return_result = check_the_winner();
if (check_the_winner() == 1) /* Added when a winner has been sensed */
{
box_creat();
if (i == 1)
{
printf("Player 2 won!\n");
}
else
{
printf("Player 1 won!\n");
}
}
}
while (return_result != 1);
return 0;
}
I added comments to most of the places I had tweaked, but here are the highlights:
I shuffled some of the functions around so that the "main" function followed all of the helper functions (the compiler was giving warnings about the original sequence of the function positions).
I corrected the "choice" tests as "choice" is an integer, so the test of "choice" needed to be compared to an integer value (e.g. zero) as opposed to character '0' (which actually has a value of 48).
The tests for three letters in a row for either player do not work in that manner. Either a test needed to be made for each box for a certain row needed to tested for an "X" or an "O", and then if that test was true the test needed to be continued for the next box in the row, and then again for the third box in the row. In lieu of that route, the test was revised to basically say "if the character in the first box in the row is the same as the character in the second box in the row, and the character in the second box in the row is the same as the character in the third box in the row, and the first box does not contain a digit character (which means is contains an "X" or an "O"), then there is a winner.
It appears that an attempt was made to mirror the contents of "Player1" and "Player2" into an array of player structures. Although initially, structure "users[0]" contained the same data as "Player1" and structure "users[1]" contained the same data as "Player2", once the data in "Player1" and "Player2" were updated, those changes did to propagate over to the "users" array. So to utilize "users" in the spirit of this program, they were defined as pointers to their respective player structures.
Those were the most significant bits. The other bits were added for a logical conclusion of the game. Note that no logic was added for a draw.
Give that a test and see if that clarifies things and follows the spirit of the project.

Tic Tac Toe using C

Brief Explanation of the Problem - The aim of the code is to make a basic tic tac toe game using C. There are two players X and O , both can enter various numbers as choice from 1-9 for each individual chance.
The game board is similar to a 3 x 3 matrix, where -
Row 1 is for 1 to 3.
Row 2 is for 4 to 6.
Row 3 is for 7 to 9.
Any number except 1-9 will throw an error and will prompt the user to re-enter the number. Unfortunately, I'm getting the same Invalid input error for a valid input. Everything else seems to work except my loop.
Here's the code for reference -
#include<stdio.h> //Tic Tac Toe
#include<stdlib.h>
#include<conio.h>
char square[10] = {'0','1','2','3','4','5','6','7','8','9'};
int choice, player;
int checkForWin();
void displayBoard();
void mrkBoard(char mark);
int main()
{
int i;
char mark;
player = 1;
do
{
displayBoard();
player = (player % 2) ? 1:2;
printf("Player %d, enter the number: ",player);
scanf("%d",&choice);
mark = (player == 1) ? 'X' : 'O';
mrkBoard(mark);
i = checkForWin();
player++;
}while(i == -1);
return 0;
}
int checkForWin()
{
int returnValue = 0;
if (square[1] == square[2] && square[2] == square[3])
{
returnValue = 1;
}
else if (square[4] == square[5] && square[5] == square[6])
returnValue = 1;
else if (square[7] == square[8] && square[8] == square[9])
returnValue = 1;
else if (square[1] == square[5] && square[5] == square[9])
returnValue = 1;
else if (square[3] == square[5] && square[5] == square[7])
returnValue = 1;
else if (square[1] == square[4] && square[4] == square[7])
returnValue = 1;
else if (square[2] == square[5] && square[5] == square[8])
returnValue = 1;
else if (square[3] == square[6] && square[6] == square[9])
returnValue = 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')
returnValue = 0;
else
returnValue = -1;
return returnValue;
}
void displayBoard()
{
system("cls");
printf("\n\nTic Tac Toe\n\n");
printf("Player 1 (X) - Player 2 (O)\n\n\n");
printf(" | | \n");
printf(" %c | %c | %c \n", square[1], square[2],square[3]);
printf("_____|_____|_____\n");
printf(" | | \n");
printf(" %c | %c | %c\n", square[4], square[5],square[6]);
printf("_____|_____|_____\n");
printf(" | | \n");
printf(" %c | %c | %c\n", square[7], square[8],square[9]);
printf(" | | \n\n");
}
void mrkBoard(char mark)
{
if (choice == 1 && square[1] == '1')
square[1] = mark;
else if (choice == 2 && square[1] == '2')
square[2] = mark;
else if (choice == 3 && square[1] == '3')
square[3] = mark;
else if (choice == 4 && square[1] == '4')
square[4] = mark;
else if (choice == 5 && square[1] == '5')
square[5] = mark;
else if (choice == 6 && square[1] == '6')
square[6] = mark;
else if (choice == 7 && square[1] == '7')
square[7] = mark;
else if (choice == 8 && square[1] == '8')
square[8] = mark;
else if (choice == 9 && square[1] == '9')
square[9] = mark;
else
{
printf("Invalid ");
player--;
getch();
}
}
#include<stdio.h> //Tic Tac Toe
#include<stdlib.h>
#include<conio.h>
char square[10] = {'0','1','2','3','4','5','6','7','8','9'};
int choice, player;
int checkForWin();
void displayBoard();
void mrkBoard(char mark);
int main()
{
int i;
char mark;
player = 1;
do
{
displayBoard();
player = (player % 2) ? 1:2;
printf("Player %d, enter the number: ",player);
scanf("%d",&choice);
mark = (player == 1) ? 'X' : 'O';
mrkBoard(mark);
i = checkForWin();
player++;
}while(i == -1);
return 0;
}
int checkForWin()
{
int returnValue = 0;
if (square[1] == square[2] && square[2] == square[3])
{
returnValue = 1;
}
else if (square[4] == square[5] && square[5] == square[6])
returnValue = 1;
else if (square[7] == square[8] && square[8] == square[9])
returnValue = 1;
else if (square[1] == square[5] && square[5] == square[9])
returnValue = 1;
else if (square[3] == square[5] && square[5] == square[7])
returnValue = 1;
else if (square[1] == square[4] && square[4] == square[7])
returnValue = 1;
else if (square[2] == square[5] && square[5] == square[8])
returnValue = 1;
else if (square[3] == square[6] && square[6] == square[9])
returnValue = 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')
returnValue = 0;
else
returnValue = -1;
return returnValue;
}
void displayBoard()
{
system("cls");
printf("\n\nTic Tac Toe\n\n");
printf("Player 1 (X) - Player 2 (O)\n\n\n");
printf(" | | \n");
printf(" %c | %c | %c \n", square[1], square[2],square[3]);
printf("_____|_____|_____\n");
printf(" | | \n");
printf(" %c | %c | %c\n", square[4], square[5],square[6]);
printf("_____|_____|_____\n");
printf(" | | \n");
printf(" %c | %c | %c\n", square[7], square[8],square[9]);
printf(" | | \n\n");
}
void mrkBoard(char mark)
{
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;
else if (choice == 9 && square[9] == '9')
square[9] = mark;
else
{
printf("Invalid ");
player--;
getch();
}
}

Implement a function to recursively return a valid win-condition - C

Issue: I'm trying to utilize recTest to check and return the winner of a simple Tic-Tac-Toe game.
I'm just unsure of what I need to pass in the call (line I've highlighted), and how to integrate my public square array.
I apologize if this is overly simple, I'm just having a rough time connecting the dots.
#include<stdio.h>
#include<conio.h>
char square[10] = {'o', '1', '2', '3', '4', '5', '6', '7', '8', '9'};
// returns -1 if no v[i] satisfies p
// returns i if v[i] satisfies p (picks largest i)
// (i>=0) and (i<n)
const int numwinpos = 8;
const int winpos[8][3] = {{1,2,3},
{4,5,6},
{7,8,9},
{1,4,7},
{2,5,8},
{3,6,9},
{1,5,9},
{3,5,7}};
//Function below, and variables above<--------------------------------------
int recTest(const int v[], const int n){
if( (n>0) && (!p(v[n-1])) )
return recTest(v,n-1);
else
return n-1;
}
/*int winnerCheck() {
//not even hard-coded tho...
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; //above 3 check across
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; //above 3 check down
else if (square[1] == square[5] && square[5] == square[9])
return 1;
else if (square[3] == square[5] && square[5] == square[7])
return 1; //above 2 check diagonal
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
//exit
return -1;
}
*/
void board() {
printf("\n\n\tTic Tac Toe\n\n");
printf("Player 1 (X) - Player 2 (O)\n\n\n");
//prints the board after every input
printf(" | | \n");
printf(" %c | %c | %c \n", square[1], square[2],square[3]);
printf("____|_____|____\n");
printf(" | | \n");
printf(" %c | %c | %c \n", square[4], square[5],square[6]);
printf("____|_____|____\n");
printf(" | | \n");
printf(" %c | %c | %c \n", square[7], square[8],square[9]);
printf(" | | \n");
}
int main() {
/*
char board[3][3] = {
};
printf("\t|\t|\t\n");
printf("\t|\t|\t\n");
printf("________|_______|________\n");
printf("\t|\t|\t\n");
printf("\t|\t|\t\n");
printf("________|_______|________\n");
printf("\t|\t|\t\n");
printf("\t|\t|\t\n");
printf("\t|\t|\t\n");
*/
int player = 1, i, choice;
char mark;
do {
board();
player = player % 2 ? 1 : 2;
printf("Player %d, enter a number: ", player);
scanf("%d", &choice);
//mark = (player == 1) ? 'X' : 'O';
if (player == 1) {
mark = 'X';
} else {
mark = 'O';
}
if (choice == 1)
square[1] = mark;
else if (choice == 2)
square[2] = mark;
else if (choice == 3)
square[3] = mark;
else if (choice == 4)
square[4] = mark;
else if (choice == 5)
square[5] = mark;
else if (choice == 6)
square[6] = mark;
else if (choice == 7)
square[7] = mark;
else if (choice == 8)
square[8] = mark;
else if (choice == 9)
square[9] = mark;
i = recTest(square, numwinpos); //HERE <--------------------------------------
player++;
} while (i == -1);
board();//call board
if (i == 1)
printf("----->\aPlayer %d WINS!<-----", --player);//nice alert sound when printed
else
printf("----->\aC-could it be...? Game draw!<-----");//nice alert sound when printed
//getch();//waits for user input before ending
return 0;
}
A quick and dirty way to use recursion would be to do something like below... and yes this can be optimized..
int winnerCheck(int x)
{
if(x < numwinpos)
{
if((square[winpos[x][0]] == 'x') && (square[winpos[x][1]] == 'x') && (square[winpos[x][2]] == 'x') ||
(square[winpos[x][0]] == 'o') && (square[winpos[x][1]] == 'o') && (square[winpos[x][2]] == 'o'))
return 1;
else
{
return winnerCheck(++x);
}
}
return 0;
}

Function avoiding certain values in array

I'm currently writing a tic-tac-toe program using C for my CS class and I keep running into errors when running that stop me from placing my move in the positions [2,3],[3,1],[3,2],[3,3], essentially only letting me place moves on the top row, and the left two columns of the second row. I'm assuming it has something to do with my check_legal_option function but I can't figure out what the problem is. Any help would be appreciated
#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <stdbool.h>
void clear_table(char table[3][3]);
void generate_player2_move(char table[3][3],int *row,int *col);
int check_table_full(char table[3][3]);
int check_three_in_a_row(char table[3][3]);
void display_table(char table[3][3]);
int check_legal_option(char table[3][3],int moveRow,int moveCol);
void update_table(char table[3][3],int pRow,int pCol);
int main(void){
char emptyTable[3][3];
int row,col,cpuRow,cpuCol,full,three,legal;
printf("This program plays the game of tic-tac-toe\n");
clear_table(emptyTable);
printf("\n");
full = check_table_full(emptyTable);
three = check_three_in_a_row(emptyTable);
while(three == 0 && full == 0){
display_table(emptyTable);
printf("Player 1 enter your selection [row,col]: ");
scanf("%d,%d",&row,&col);
legal=check_legal_option(emptyTable,row,col);
printf("%d",legal);
while(legal!=1){
printf("Player 1 enter your selection [row,col]: ");
scanf("%d,%d",&row,&col);
legal=check_legal_option(emptyTable,row,col);
}
update_table(emptyTable,row-1,col-1);
generate_player2_move(emptyTable,&cpuRow,&cpuCol);
full = check_table_full(emptyTable);
three = check_three_in_a_row(emptyTable);
}
if(three == 1){
printf("Congratulations, Player 1 wins!\n");
}
else if(three == 2){
printf("Congratulations, Computer wins!\n");
}
else{
printf("Game over, no player wins.\n");
}
}
void clear_table(char table[3][3]){
for(int i=0;i<3;i++){
for(int j=0;j<3;j++){
table[i][j] = '_';
}
}
}
void generate_player2_move(char table[3][3],int *row,int *col){
srand (time(NULL));
do{
*row = rand()%3;
*col = rand()%3;
int legal = check_legal_option(table,*row,*col);
}while(!check_legal_option(table,*row,*col));
table[*row][*col] = 'O';
}
int check_table_full(char table[3][3]){
if(table[0][0] == table[0][1] && table[0][1] == table[0][2] && table[0][2] == table[1][0] && table[1][0] == table[1][1] && table[1][1] == table[1][2] && table[1][2]
== table[2][0] && table[2][0] == table[2][1] && table[2][1] == table[2][2] && table[0][0] != '_' && check_three_in_a_row(table) == 0){
return 3;
}
return 0;
}
int check_three_in_a_row(char table[3][3]){
for(int i=0;i<3;i++){
if(table[i][0] == table[i][1] && table[i][1] == table[i][2] && table[i][0] == 'X'){
return 1;
}
if(table[i][0] == table[i][1] && table[i][1] == table[i][2] && table[i][0] == 'O'){
return 2;
}
}
for(int j=0;j<3;j++){
//checks if player 1 or CPU gets vertical win
if(table[0][j] == table[1][j] && table[1][j] == table[2][j] &&
table[0][j] == 'X'){
return 1;
}
if(table[0][j] == table[1][j] && table[1][j] == table[2][j] && table[0][j] == 'O'){
return 2;
}
}
//checks if player 1 or CPU gets diagonal win one way
if(table[0][0] == table[1][1] && table[1][1] == table[2][2] && table[0][0] == 'X'){
return 1;
}
if(table[0][0] == table[1][1] && table[1][1] == table[2][2] && table[0][0] == 'O'){
return 2;
}
//checks if player 1 or CPU gets diagonal win another way
if(table[0][2] == table[1][1] && table[1][1] == table[2][0] && table[0][2] == 'X'){
return 1;
}
if(table[0][2] == table[1][1] && table[1][1] == table[2][0] && table[0][2] == 'O'){
return 2;
}
//if no one has three in a row, return 0
return 0;
}
void display_table(char table[3][3]){
printf("The current state of the game is:");
for(int i=0;i<3;i++){
printf("\n");
for(int j=0;j<3;j++){
printf("%c ",table[i][j]);
}
}
printf("\n");
}
int check_legal_option(char table[3][3],int moveRow,int moveCol){
if(table[moveCol][moveCol]=='_'){
return 1;
}
return 0;
}
void update_table(char table[3][3],int pRow,int pCol){
table[pRow][pCol] = 'X';
}
The check_legal function uses movecol in both the columns and rows.

Struggling with TicTacToe in C

I tried to program a simple TicTacToe in C. The program itselfs compiles and show no errors.
So the program draws the field, reads the names and let a player put his symbol in a specific field. All this happens in a while loop, the should be run until its a draw or someone wins.
But the program just run the loop one time so there is only one turn then the program stops.
So here is my code:
main.c:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "game.h"
#define NAMELENGTH 20
int main(void) {
char names[2][NAMELENGTH];
// field positions
char field[9];
int winner = -1;
getnames(names);
printf("\n\n");
initField(field);
// set field positions to 'empty'
char actualPlayer = (char)(get_random_number()*10.0) % 2;
while (1) {
drawField(field);
turn(actualPlayer, names, field);
winner = isWinner(actualPlayer, field);
drawField(field);
if (winner >= 1) {
printwinner(winner, names);
return 0;
}
else if (winner == 0) {
printDrawGame(names);
return 0;
}
actualPlayer = (actualPlayer + 1) % 2;
}
return 0;
}
game.h Headerfile:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#define NAMELENGTH 20
#pragma warning(disable:4996)
extern void drawField(char *field);
extern void getnames(char nameField[][NAMELENGTH]);
extern void initField(char *field);
extern void turn(char actualPlayer, char names[][NAMELENGTH], char *field);
extern char isWinner(char actualPlayer, char *field);
extern void printwinner(char winnerNumber, char names[][NAMELENGTH]);
extern void printDrawGame(char names[][NAMELENGTH]);
extern double get_random_number();
and then my game.c where I defined my functions:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "game.h"
#define NAMELENGTH 20
#pragma warning(disable:4996)
void drawField(char *field) {
printf("________________________\n");
printf("| | | |\n");
printf("| %c | %c | %c |\n", field[0], field[1], field[2]);
printf("|_______|_______|______|\n");
printf("| | | |\n");
printf("| %c | %c | %c |\n", field[3], field[4], field[5]);
printf("|_______|_______|______|\n");
printf("| | | |\n");
printf("| %c | %c | %c |\n", field[6], field[7], field[8]);
printf("|_______|_______|______|\n");
}
void getnames(char nameField[][NAMELENGTH]) {
printf("Name of the first player: ");
scanf("%s", nameField[0]);
printf("Name of the second player: ");
scanf("%s", nameField[1]);
}
void initField(char *field) {
for (int i = 0; i <= 8; i++)
{
field[i] = i + '1';
}
}
void turn(char actualPlayer, char names[][NAMELENGTH], char *field) {
char symbol = ' ';
int p1fieldnumber;
int p2fieldnumber;
if (actualPlayer == 0)
{
do {
printf("\nIts Player %s's turn.", names[0]);
char symbol = 'X';
printf("\nNumber of the field which you want to put your symbol in: ");
scanf("%d", &p1fieldnumber);
if (field[p1fieldnumber] == 'X' || field[p1fieldnumber] == 'O')
{
printf("\nField is already occupied!");
p1fieldnumber = 10;
}
} while (p1fieldnumber < 1 || p1fieldnumber > 9);
field[p1fieldnumber-1] = 'X';
}
else {
do {
printf("\nIts Player %s's turn.", names[1]);
char symbol = 'O';
printf("\nNumber of the field which you want to put your symbol in: ");
scanf("%d", &p2fieldnumber);
if (field[p2fieldnumber] == 'X' || field[p2fieldnumber] == 'O')
{
printf("\nField is already occupied!");
p2fieldnumber = 10;
}
} while (p2fieldnumber < 1 || p2fieldnumber > 9);
field[p2fieldnumber-1] = 'O';
}
}
char isWinner(char actualPlayer, char *field) {
char pwinner = '3';
if (((field[0] == 'O') && (field[1] == 'O') && (field[2] == 'O')) ||
(field[3] == 'O') && (field[4] == 'O') && (field[5] == 'O') ||
(field[6] == 'O') && (field[7] == 'O') && (field[8] == 'O') ||
(field[0] == 'O') && (field[4] == 'O') && (field[8] == 'O') ||
(field[2] == 'O') && (field[4] == 'O') && (field[6] == 'O') ||
(field[0] == 'O') && (field[3] == 'O') && (field[6] == 'O') ||
(field[1] == 'O') && (field[4] == 'O') && (field[7] == 'O') ||
(field[2] == 'O') && (field[5] == 'O') && (field[8] == 'O'))
{
pwinner = '2';
}
else if (((field[0] == 'X') && (field[1] == 'X') && (field[2] == 'X')) ||
(field[3] == 'X') && (field[4] == 'X') && (field[5] == 'X') ||
(field[6] == 'X') && (field[7] == 'X') && (field[8] == 'X') ||
(field[0] == 'X') && (field[4] == 'X') && (field[8] == 'X') ||
(field[2] == 'X') && (field[4] == 'X') && (field[6] == 'X') ||
(field[0] == 'X') && (field[3] == 'X') && (field[6] == 'X') ||
(field[1] == 'X') && (field[4] == 'X') && (field[7] == 'X') ||
(field[2] == 'X') && (field[5] == 'X') && (field[8] == 'X'))
{
pwinner = '1';
}
else if (((field[0] == 'X') || (field[0] == 'O')) && ((field[1] == 'X') || (field[1] == 'O')) && ((field[2] == 'X') || (field[2] == 'O')) ||
((field[3] == 'X') || (field[3] == 'O')) && ((field[4] == 'X') || (field[4] == 'O')) && ((field[5] == 'X') || (field[5] == 'O')) ||
((field[6] == 'X') || (field[6] == 'O')) && ((field[7] == 'X') || (field[7] == 'O')) && ((field[8] == 'X') || (field[8] == 'O')) ||
((field[0] == 'X') || (field[0] == 'O')) && ((field[4] == 'X') || (field[4] == 'O')) && ((field[8] == 'X') || (field[8] == 'O')) ||
((field[2] == 'X') || (field[2] == 'O')) && ((field[4] == 'X') || (field[4] == 'O')) && ((field[6] == 'X') || (field[6] == 'O')) ||
((field[0] == 'X') || (field[0] == 'O')) && ((field[3] == 'X') || (field[3] == 'O')) && ((field[6] == 'X') || (field[6] == 'O')) ||
((field[1] == 'X') || (field[1] == 'O')) && ((field[4] == 'X') || (field[4] == 'O')) && ((field[7] == 'X') || (field[7] == 'O')) ||
((field[2] == 'X') || (field[2] == 'O')) && ((field[5] == 'X') || (field[5] == 'O')) && ((field[8] == 'X') || (field[8] == 'O')))
{
pwinner = '0';
}
return pwinner;
}
void printwinner(char winnerNumber, char names[][NAMELENGTH]) {
if (winnerNumber == '1') {
printf("Player %s won!", names[0]);
}
else if (winnerNumber == '2') {
printf("Player %s won!", names[1]);
}
}
void printDrawGame(char names[][NAMELENGTH]) {
printf("Draw!");
}
static int _initialized;
double get_random_number() {
if (!_initialized) {
srand(time(NULL));
_initialized = 1;
}
return (double)rand() / ((double)(RAND_MAX)+1);
}
There are multiple issues
isWinner returns characters '0', '1', '2' and '3'. Replace them with numbers 0, 1, 2, 3, because your are comparing with numbers in main.
In main instead of checking if (winner >= 1) {, which is true even if 3 is returned by isWinner, check for if (winner == 1 || winner == 2) {.
Suggest to use parentheses in isWinner around each condition separated by ||.
Parentheses as shown below for the first condition
if (((field[0] == 'O') && (field[1] == 'O') && (field[2] == 'O')) ||
((field[3] == 'O') && (field[4] == 'O') && (field[5] == 'O')) ||
((field[6] == 'O') && (field[7] == 'O') && (field[8] == 'O')) ||
((field[0] == 'O') && (field[4] == 'O') && (field[8] == 'O')) ||
((field[2] == 'O') && (field[4] == 'O') && (field[6] == 'O')) ||
((field[0] == 'O') && (field[3] == 'O') && (field[6] == 'O')) ||
((field[1] == 'O') && (field[4] == 'O') && (field[7] == 'O')) ||
((field[2] == 'O') && (field[5] == 'O') && (field[8] == 'O')))

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