Write showMessage function

src/main/c/VierGewinnt.c

@@ -227,5 +227,8 @@ int checkWin(char board[ROWS][COLS], char player) {
 }
 
 
-
+// Write showMessage function
+void showMessage(const char* messageColor, const char* message) {
+    printf("%s%s"RESET_COLOR, messageColor, message);
+}