Added checking for repeating wrong characters

go.mod

@@ -1,3 +1,3 @@
-module file-reader
+module hangman
 
 go 1.22

main.go

@@ -21,6 +21,7 @@ var (
 	randWord      string
 	hiddenChars   []string
 	revealedChars []string
+	wrongChars    []string
 )
 
 type PlayerStats struct {
@@ -45,8 +46,8 @@ func fillSecrets() {
 }
 
 func main() {
-	if len(os.Args) < 2 || len(os.Args) > 2 {
-		fmt.Println("Usage: ./file-reader words.txt")
+	if len(os.Args) != 2 {
+		fmt.Println("Usage: ./hangman words.txt")
 		os.Exit(1)
 	}
 	filePath = os.Args[1]
@@ -97,6 +98,7 @@ func gameStatus() {
 	fmt.Println("Player:", player.name)
 	fmt.Println("Lives:", player.lives)
 	fmt.Println("Word:", hiddenChars)
+	fmt.Println("Wrong characters:", wrongChars)
 }
 
 func checkWin() {
@@ -124,12 +126,24 @@ func game() {
 		fmt.Scanln(&guess)
 
 		if getLetter(guess) != true {
+			var isAlreadyWrong bool = false
+			for _, v := range wrongChars {
+				if v == guess {
+					isAlreadyWrong = true
+				}
+			}
+			if isAlreadyWrong == true {
+				fmt.Printf("You've already guessed this letter")
+				time.Sleep(1 * time.Second)
+			} else {
 				fmt.Printf("Wrong!")
+				wrongChars = append(wrongChars, guess)
 				player.lives--
 				time.Sleep(1 * time.Second)
 			}
 		}
 	}
+}
 
 func catchErr(err error) {
 	if err != nil {