From b11dbda83099223113804520058d3afd22b6e4c8 Mon Sep 17 00:00:00 2001
From: Lei Yu <s444814187@gmail.com>
Date: Fri, 27 Apr 2018 08:30:04 -0400
Subject: initial commit

---
 Tic Tac Toe.c | 135 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 Tic Tac Toe.c

diff --git a/Tic Tac Toe.c b/Tic Tac Toe.c
new file mode 100644
index 0000000..2506cd0
--- /dev/null
+++ b/Tic Tac Toe.c	
@@ -0,0 +1,135 @@
+#include<stdio.h>
+#include<stdlib.h>
+#include<ctype.h>
+#include<string.h>
+char check_board(char[10],char[10]);
+int print_board(char[10]);
+int check_tied(char[10]);
+// 0|1|2
+// - - -
+// 3|4|5
+// - - -
+// 6|7|8
+
+int main(void){
+    char board[10] = "         ";
+    char vis_board[10] = "123456789";
+    int x_turn = 1;
+    int o_turn = 0;
+    int block;
+    char gg[10];
+    char *ptr;
+    
+    //main game loop
+    while (1){
+
+        while (1){
+            print_board(vis_board);
+            if (x_turn){
+                printf("x's turn");
+            } else {
+                printf("o's turn");
+            }
+            printf("\nWhich block? ");
+            //------------Input validation
+            scanf("%s",gg);
+            block = strtol(gg,&ptr,10);
+            //printf("-%u-\n",*ptr);
+            if (*ptr != 0){
+                printf("Please enter a interger(1-9)\n");
+                continue;
+            }
+                if (board[block-1] == 'x' || board[block-1] == 'o' || block == 0){
+                    printf("%d already taken\n",block);
+                } else {
+                    if (x_turn){
+                        board[block-1] = 'x';
+                        vis_board[block-1] = 'x';
+                    } else if (o_turn){
+                        board[block-1] = 'o';
+                        vis_board[block-1] = 'o';
+                    }
+                    break;
+                }
+                
+        }
+        
+        
+        //checks if win condition met or tie
+        if (check_board(vis_board,board) == 1){
+            if (x_turn){
+                print_board(vis_board);
+                printf("\ncongratz %c wins!\n",'x');
+            }
+            if (o_turn){
+                print_board(vis_board);
+                printf("\ncongratz %c wins!\n",'x');
+            }
+            break;
+        } else if (check_board(vis_board,board) == 2){
+            print_board(vis_board);
+            printf("\nGame tied\n");
+            break;
+        }
+        
+        x_turn = !x_turn;
+        o_turn = !o_turn;
+
+
+    }
+
+    return(0);
+}
+
+int print_board(char board[10]){
+    for (int i = 0; i < strlen(board); ++i){
+        printf("%c",board[i]);
+        if (i != 2 && i != 5 && i != 8){
+            printf("|");
+        } else if (i != 8){
+            printf("\n- - -\n");
+        }
+    }
+    printf("\n");
+    return(0);
+}
+
+char check_board(char board[10],char board2[10]){
+    //return 1 when win condition 0 otherwise 2 if game tied
+    //horizontal
+    if (board[0] == board[1] && board[0] == board[2]){
+        return (1);
+    } else if (board[3] == board[4] && board[3] == board[5]){
+        return board[3];
+    } else if (board[6] == board[7] && board[6] == board[8]){
+        return (1);
+    //vertical
+    } else if (board[0] == board[3] && board[0] == board[6]){
+        return (1);
+    } else if (board[1] == board[4] && board[1] == board[7]){
+        return (1);
+    } else if (board[2] == board[5] && board[2] == board[8]){
+        return (1);
+    //diagonal
+    } else if (board[0] == board[4] && board[0] == board[8]){
+        return (1);
+    } else if (board[2] == board[4] && board[2] == board[6]){
+        return (1);
+    //check if tied game
+    } else if (check_tied(board2)){
+        return(2);
+    }else {
+        return(0);
+    }
+}
+
+
+int check_tied(char board[10]){
+    //run through board if ' ' is found return 0 else return 1
+    for (int i = 0; i < 9; ++i){
+        if (board[i] == ' '){
+            return(0);
+        }
+    }
+    return(1);
+}
-- 
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