Add robust input validation for row and column inputs

Author: ZerubbabelT

TIC_TAC_TOE/index.py

@@ -15,17 +15,31 @@ def check_winner(board, player):
 
 def is_full(board):
     return all(cell != " " for row in board for cell in row)
+# A function that validates user input
+def get_valid_input(prompt):
+    while True:
+        try:
+            value = int(input(prompt))
+            if 0 <= value < 3:  # Check if the value is within the valid range
+                return value
+            else:
+                print("Invalid input: Enter a number between 0 and 2.")
+        except ValueError:
+            print("Invalid input: Please enter an integer.")
 
 def main():
     board = [[" " for _ in range(3)] for _ in range(3)]
     player = "X"
 
     while True:
         print_board(board)
-        row = int(input(f"Player {player}, enter the row (0, 1, 2): "))
-        col = int(input(f"Player {player}, enter the column (0, 1, 2): "))
+        print(f"Player {player}'s turn:")
+
+        # Get validated inputs
+        row = get_valid_input("Enter the row (0, 1, 2): ")
+        col = get_valid_input("Enter the column (0, 1, 2): ")
 
-        if 0 <= row < 3 and 0 <= col < 3 and board[row][col] == " ":
+        if board[row][col] == " ":
             board[row][col] = player
 
             if check_winner(board, player):
@@ -40,7 +54,7 @@ def main():
 
             player = "O" if player == "X" else "X"
         else:
-            print("Invalid move. Try again.")
+            print("Invalid move: That spot is already taken. Try again.")
 
 if __name__ == "__main__":
     main()