content: -- Haskell示例代码 - CodeForge 代码执行环境
  
  import Data.List (intercalate)
  
  main :: IO ()
  main = do
      putStrLn "🎉 欢迎使用 CodeForge!"
      putStrLn "Welcome to CodeForge!"
      putStrLn ""
  
      putStrLn "========================================="
      putStrLn "          CodeForge Haskell            "
      putStrLn "========================================="
      putStrLn ""
  
      -- 基本输出示例
      putStrLn "✅ Haskell运行成功! (Haskell is working!)"
      putStrLn "⚡ 这是Haskell程序 (This is Haskell program)"
      putStrLn ""
  
      -- 变量操作
      let name = "CodeForge"
          version = "Haskell"
          number1 = 10
          number2 = 20
          result = number1 + number2
  
      putStrLn "🔢 简单计算 (Simple calculation):"
      putStrLn $ show number1 ++ " + " ++ show number2 ++ " = " ++ show result
      putStrLn ""
  
      -- 字符串操作
      putStrLn "📝 字符串操作 (String operations):"
      putStrLn $ "平台名称 (Platform): " ++ name
      putStrLn $ "语言版本 (Language): " ++ version
      putStrLn $ "完整信息 (Full info): " ++ name ++ " - " ++ version
      putStrLn ""
  
      -- 列表操作
      putStrLn "🍎 列表示例 (List example):"
      let fruits = ["苹果", "香蕉", "橙子", "葡萄"]
      mapM_ (\(i, fruit) -> putStrLn $ show (i + 1) ++ ". " ++ fruit) (zip [0..] fruits)
      putStrLn ""
  
      -- 条件判断
      let score = 85
      putStrLn "📊 成绩评估 (Score evaluation):"
      putStrLn $ evaluateScore score
      putStrLn ""
  
      -- 循环示例
      putStrLn "🔄 循环输出 (Loop output):"
      mapM_ (\i -> putStrLn $ "第 " ++ show i ++ " 次输出 (Output #" ++ show i ++ "): Hello from CodeForge!") [1..5]
      putStrLn ""
  
      -- 递归示例 (模拟while循环)
      putStrLn "🔁 递归示例 (Recursion example):"
      countDown 3
      putStrLn ""
  
      putStrLn "🎯 CodeForge Haskell代码执行完成!"
      putStrLn "🎯 CodeForge Haskell execution completed!"
      putStrLn ""
      putStrLn "感谢使用 CodeForge 代码执行环境! 🚀"
      putStrLn "Thank you for using CodeForge! 🚀"
  
  -- 评估分数的函数
  evaluateScore :: Int -> String
  evaluateScore score
      | score >= 90 = "优秀! (Excellent!)"
      | score >= 80 = "良好! (Good!)"
      | score >= 60 = "及格 (Pass)"
      | otherwise   = "需要努力 (Need improvement)"
  
  -- 递归倒计数函数 (模拟while循环)
  countDown :: Int -> IO ()
  countDown 0 = return ()
  countDown n = do
      putStrLn $ "递归循环: 第 " ++ show (4 - n) ++ " 次"
      countDown (n - 1)