diff --git a/LL1/src/AnalyzeTable.kt b/LL1/src/AnalyzeTable.kt
index dee0b25..28f7036 100644
--- a/LL1/src/AnalyzeTable.kt
+++ b/LL1/src/AnalyzeTable.kt
@@ -19,8 +19,8 @@ class AnalyzeTable {
     """.trimIndent()
     )
 
-    constructor(lang: String, _s: String? = null) {
-        start = _s ?: lang.trim()[0].toString()
+    constructor(lang: String, startSym: String? = null) {
+        start = startSym ?: lang.trim()[0].toString()
 
         val newLang = if ("::=" in lang) { // 换成一个符号方便
             lang.replace("::=", "->")