diff --git a/playground/main.snow b/playground/Main.snow
similarity index 100%
rename from playground/main.snow
rename to playground/Main.snow
diff --git a/playground/test.snow b/playground/Math.snow
similarity index 86%
rename from playground/test.snow
rename to playground/Math.snow
index 161b7b2..e79d078 100644
--- a/playground/test.snow
+++ b/playground/Math.snow
@@ -2,7 +2,7 @@ module: Math
     function: factorial
         parameter:
             declare n1: long
-            declare n2: long
+            declare n2: int
         return_type: long
         body:
            return n1+n2
diff --git a/src/main/java/org/jcnc/snow/compiler/lexer/core/LexerEngine.java b/src/main/java/org/jcnc/snow/compiler/lexer/core/LexerEngine.java
index 819fa07..4d06999 100644
--- a/src/main/java/org/jcnc/snow/compiler/lexer/core/LexerEngine.java
+++ b/src/main/java/org/jcnc/snow/compiler/lexer/core/LexerEngine.java
@@ -48,7 +48,7 @@ public class LexerEngine {
      * 构造时立即进行全量扫描。
      *
      * @param source     源代码文本
-     * @param sourceName 文件名或来源描述（如"main.snow"）
+     * @param sourceName 文件名或来源描述（如"Main.snow"）
      */
     public LexerEngine(String source, String sourceName) {
         this.context = new LexerContext(source);
diff --git a/src/main/java/org/jcnc/snow/compiler/semantic/error/SemanticError.java b/src/main/java/org/jcnc/snow/compiler/semantic/error/SemanticError.java
index 4a36d25..113777e 100644
--- a/src/main/java/org/jcnc/snow/compiler/semantic/error/SemanticError.java
+++ b/src/main/java/org/jcnc/snow/compiler/semantic/error/SemanticError.java
@@ -16,7 +16,7 @@ import org.jcnc.snow.compiler.parser.ast.base.Node;
  *
  * <p><b>示例输出：</b></p>
  * <pre>
- *   D:\Devs\IdeaProjects\Snow\playground\main.snow: 行 7, 列 28: 参数类型不匹配 (位置 1): 期望 int, 实际 long
+ *   D:\Devs\IdeaProjects\Snow\playground\Main.snow: 行 7, 列 28: 参数类型不匹配 (位置 1): 期望 int, 实际 long
  * </pre>
  *
  * @param node    指向发生语义错误的 AST 节点，可用于获取详细的位置信息（文件名、行号、列号等）