diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index ce1c62c..622f299 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -5,6 +5,7 @@
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="openjdk-21" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
diff --git a/.idea/misc.xml b/.idea/misc.xml
index ac2c845..687193e 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -4,7 +4,7 @@
   <component name="FrameworkDetectionExcludesConfiguration">
     <file type="web" url="file://$PROJECT_DIR$" />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_22" default="true" project-jdk-name="openjdk-22" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" project-jdk-name="openjdk-22" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/src/main/CTests/test.c b/src/main/CTests/test.c
index c9797df..f26d027 100644
--- a/src/main/CTests/test.c
+++ b/src/main/CTests/test.c
@@ -12,8 +12,8 @@ int A(int a){
     return m;
 }
 
-char Test(int para1,char para2){
-    int c1 = para1,   i_doNothingbuttest =    2;
-    c1 = para2;
-    return c2;
-}
\ No newline at end of file
+//char Test(int para1,char para2){
+//    int c1 = para1,   i_doNothingbuttest =    2;
+//    c1 = para2;
+//    return c2;
+//}
\ No newline at end of file
diff --git a/src/main/kotlin/core/CFunction.kt b/src/main/kotlin/core/CFunction.kt
index f51ccbb..5d03b1b 100644
--- a/src/main/kotlin/core/CFunction.kt
+++ b/src/main/kotlin/core/CFunction.kt
@@ -1,19 +1,23 @@
 package core
 
 import core.CLanguage.Companion.typenameToTypeEnum
+import org.w3c.dom.Node
 import java.io.File
 
 class CFunction(
   val name: String, source: String // 函数名
 ) {
   val returnType: CLanguage.Companion.CTYPES // 返回类型
-  val params: List<Map<String,CLanguage.Companion.CTYPES>>? // 参数 Map<name,T> 与实际相反
+  val params: List<Map<String, CLanguage.Companion.CTYPES>>? // 参数 Map<name,T> 与实际相反
+  var paramNameList: List<String> = emptyList()
+    private set
   val content: String
+  val cParser: CParser
 
   init {
     this.params = parseParameters(source)
     this.content = parseContent(source)
-
+    cParser = CParser(content, paramNameList)
     returnType = typenameToTypeEnum(parseReturnType(source)) ?: CLanguage.Companion.CTYPES.void
   }
 
@@ -27,7 +31,11 @@ class CFunction(
     val paramPattern = Regex("$name[ |\n]?\\((.*?)\\)[ |\n]?\\{") // main[这里随便空格换行](params...){
     val match = paramPattern.find(source)
     val paramsList = match?.groups?.get(1)?.value?.split(",")?.map { it.trim() } // 函数最开始的那个括号里面
-
+    paramNameList = if (paramsList.isNullOrEmpty() || paramsList.first().isEmpty()) {
+      emptyList()
+    } else {
+      paramsList.map { it.split(' ').last() }
+    }
     return paramsList?.map { param ->
       val parts = param.split(" ")
       val type = typenameToTypeEnum(parts[0]) ?: return@map emptyMap()
@@ -44,24 +52,51 @@ class CFunction(
     // 找到 {} 的位置
     var firstOccur = -1
     var bracket = 0 // 下一次到0就说明匹配完了
-    for (i in index..source.lastIndex){
-      if (source[i] == '{'){
-        if (firstOccur == -1){ // 第一次遇见
+    for (i in index..source.lastIndex) {
+      if (source[i] == '{') {
+        if (firstOccur == -1) { // 第一次遇见
           firstOccur = i
         }
-        bracket ++
-      }else if (source[i] == '}'){
-        bracket --
-        if (bracket == 0){
-          return source.substring(firstOccur+1..<i).trim() // 不加大括号
+        bracket++
+      } else if (source[i] == '}') {
+        bracket--
+        if (bracket == 0) {
+          return source.substring(firstOccur + 1..<i).trim() // 不加大括号
         }
       }
     }
     return ""
   }
-}
 
-fun main(){
-  val fun_main = CFunction("Test", File("/home/kagura/repo/VariableRelation/src/main/CTests/test.c").readText())
-  println("${fun_main.name}(${fun_main.params}) -> ${fun_main.returnType} {${fun_main.content}} ")
+  fun getTraceTree(): List<TraceTree> {
+    // 初始化 Trace Tree
+    val nodes = mutableListOf<TraceTree>()
+    cParser.defineList.forEach {
+      nodes.add(TraceTree(it, null, null))
+    }
+
+    // 然后根据句子来获得 TraceTree
+    cParser.sentenceList.forEachIndexed { index, sentence ->
+      if (sentence.type == CLanguage.Companion.OPERATION.DEFINE_VALUE_PARAM || sentence.type == CLanguage.Companion.OPERATION.CHANGE_VALUE_PARAM) {
+        // 例子:
+        // x,A(z),CHANGE_VALUE
+        // A,z,CHANGE_VALUE_PARAM
+        // y,x,CHANGE_VALUE
+        // -,x,CHANGE_VALUE_PARAM
+        if (index > 1) { // 按理来说肯定成立，加个检查防止意外
+          val left = cParser.sentenceList[index - 1].left
+          val lNode = nodes.findNode(left)
+          val rNode = nodes.findNode(sentence.right)
+          val funName = sentence.left
+          if (lNode != null && rNode != null) {
+            lNode.changedBy = rNode
+            if (funName != "-") {
+              lNode.upperFuncName = funName
+            }
+          }
+        }
+      }
+    }
+    return nodes.getDeepest()
+  }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/core/CLanguage.kt b/src/main/kotlin/core/CLanguage.kt
index 9936870..7e3f26c 100644
--- a/src/main/kotlin/core/CLanguage.kt
+++ b/src/main/kotlin/core/CLanguage.kt
@@ -1,14 +1,14 @@
 package core
 
-import java.io.File
-
 class CLanguage {
   companion object {
     val types = listOf("void","char","int","short","long","float","double","struct")
     enum class OPERATION {
       DEFINE_VALUE, // `type` identifier = RHand 题目里 def-use
       FUNCTION_INVOCATION, // func(value-param) 题目里
-      VALUE_CHANGE, // identifier = RHAND
+      CHANGE_VALUE, // identifier = RHAND
+      DEFINE_VALUE_PARAM, // int a=b, 一直接在上一个后面
+      CHANGE_VALUE_PARAM, // a = b
       RETURN // 字面意思
     }
     enum class CTYPES {
diff --git a/src/main/kotlin/core/CParser.kt b/src/main/kotlin/core/CParser.kt
index 7162b8e..435b4ce 100644
--- a/src/main/kotlin/core/CParser.kt
+++ b/src/main/kotlin/core/CParser.kt
@@ -1,19 +1,21 @@
 package core
 
-import java.io.File
+class Sentence(val left: String, val right: String, val type: CLanguage.Companion.OPERATION)
 
-class CParser(content: String) {
-  class Sentence(val left: String, val right: String, val type: CLanguage.Companion.OPERATION)
+class CParser(content: String, paramNameList: List<String>) {
 
   companion object {
-    val lrexp_regex = "(.*)[ ]?=[ ]?(.*)[ ]?;?$".toRegex() // 左1右2, 空格去掉前面type
-    val func_invoke_regex = "(.*)[ ]?\\((.*)\\)[ ]?$".toRegex() // 匹配到的是1函数名2参数列表
+    val lrexp_regex = "(.*)[ ]?=[ ]?(.*)[ ]?;?$".toRegex() // 左1右2
+    val func_invoke_regex = "(.*)[ ]?\\((.*)\\)[ ]?$".toRegex() // 匹配到的是1:函数名2:参数列表
   }
 
   val sentenceList = mutableListOf<Sentence>()
   val defineList = mutableListOf<String>()
 
-  init { // 第一轮解析获得基本语义
+  init {
+    // 把参数加进去
+    defineList.addAll(paramNameList)
+    // 第一轮解析获得基本语义
     content.split(';').forEach {
       val line = it.trim()
       if (line.contains('=')) { // 出现了left hand 和 right hand
@@ -26,6 +28,7 @@ class CParser(content: String) {
               val rightHand = match.groupValues[2].trim() // Right-hand side (value)
               sentenceList.add(Sentence(leftHand, rightHand, CLanguage.Companion.OPERATION.DEFINE_VALUE))
               defineList.add(leftHand)
+              sentenceList.addAll(rightHandSimpleParser(rightHand, CLanguage.Companion.OPERATION.DEFINE_VALUE))
             }
           }
         } else { // 重新定义
@@ -33,33 +36,67 @@ class CParser(content: String) {
           if (match != null) {
             val leftHand = match.groupValues[1].trim() // Left-hand side (variable)
             val rightHand = match.groupValues[2].trim() // Right-hand side (value)
-            sentenceList.add(Sentence(leftHand, rightHand, CLanguage.Companion.OPERATION.VALUE_CHANGE))
+            sentenceList.add(Sentence(leftHand, rightHand, CLanguage.Companion.OPERATION.CHANGE_VALUE))
+            sentenceList.addAll(rightHandSimpleParser(rightHand, CLanguage.Companion.OPERATION.CHANGE_VALUE))
           }
         }
       } else if (line.contains("return")) { // return
         val returnValue = line.split(' ').last()
-        sentenceList.add(Sentence("return",returnValue,CLanguage.Companion.OPERATION.RETURN))
+        sentenceList.add(Sentence("return", returnValue, CLanguage.Companion.OPERATION.RETURN))
       } else { // 调用函数，解析参数就行了
         val match = func_invoke_regex.find(line)  // 如果是后面的就要这个
         if (match != null) {
           val func_name = match.groupValues[1].trim().split(' ').last() // Left-hand side (variable)
           val args = match.groupValues[2].trim() // Right-hand side (value)
           args.split(',').forEach { arg ->
-            if (arg in defineList){ // 定义过的变量
-              sentenceList.add(Sentence(func_name,arg,CLanguage.Companion.OPERATION.FUNCTION_INVOCATION))
+            if (arg in defineList) { // 定义过的变量
+              sentenceList.add(Sentence(func_name, arg, CLanguage.Companion.OPERATION.FUNCTION_INVOCATION))
             }
           }
         }
       }
     }
   }
-}
 
-fun main() {
-  val fun_main = CFunction("main", File("/home/kagura/repo/VariableRelation/src/main/CTests/test.c").readText())
-  val source = fun_main.content
-  val cParser = CParser(source)
-  cParser.sentenceList.forEach {
-    println("${it.left}<-${it.right}, ${it.type}")
+  private fun rightHandSimpleParser(right: String, type: CLanguage.Companion.OPERATION): List<Sentence> { // 解析右边表达式的
+    fun getType(): CLanguage.Companion.OPERATION {
+      return when (type) { // 改变类型
+        CLanguage.Companion.OPERATION.DEFINE_VALUE -> {
+          CLanguage.Companion.OPERATION.DEFINE_VALUE_PARAM
+        }
+
+        CLanguage.Companion.OPERATION.CHANGE_VALUE -> {
+          CLanguage.Companion.OPERATION.CHANGE_VALUE_PARAM
+        }
+
+        else -> {
+          CLanguage.Companion.OPERATION.RETURN
+        }
+      }
+    }
+
+    val result = mutableListOf<Sentence>()
+    // 先看看是不是调用函数
+    if ('(' in right) {
+      val match = func_invoke_regex.find(right)
+      if (match != null) {
+        val funName = match.groupValues[1].trim()
+        val params = match.groupValues[2].trim().split(',')
+        for (param in params) {
+          if (param in defineList) { // 定义过的才操作
+            result.add(Sentence(funName, param, getType()))
+          }
+        }
+      }
+    } else {
+      if (right in defineList) { // 看看有没有使用值
+        result.add(
+          Sentence(
+            "-", right, getType()
+          )
+        )
+      }
+    }
+    return result
   }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/core/SourceFile.kt b/src/main/kotlin/core/SourceFile.kt
index 5903d12..73f2328 100644
--- a/src/main/kotlin/core/SourceFile.kt
+++ b/src/main/kotlin/core/SourceFile.kt
@@ -3,16 +3,112 @@ package core
 import java.io.File
 
 class SourceFile {
-  private val content: String
+  companion object {
+    val function_define_regex = """\b([a-zA-Z_][a-zA-Z0-9_]*)\s*\([^)]*\)\s*\{""".toRegex() // main(){ 匹配函数名
 
-  constructor(file: File){
-    if (!file.isFile){
+    fun deleteNotes(src: String): String {
+      return src.lines()
+        .filter { line -> !line.trimStart().startsWith("#include") && !line.trimStart().startsWith("//") }
+        .joinToString("\n") { line ->
+          val withoutTrailingComment = line.replace(Regex("//.*$"), "")
+          withoutTrailingComment.trimStart()
+        }
+    }
+  }
+
+  private val content: String
+  private var functions: List<CFunction> = emptyList()
+
+  constructor(file: File) {
+    if (!file.isFile) {
       throw NoSuchFileException(file)
     }
-    content = file.readText()
+    content = deleteNotes(file.readText())
   }
 
-  constructor(content: String){
-    this.content = content
+  constructor(content: String) {
+    this.content = deleteNotes(content.trim())
   }
+
+  fun parseFunction(): List<CFunction> { // 找所有的函数定义
+    val result = mutableListOf<CFunction>()
+    function_define_regex.findAll(content).forEach {
+      if (it.groups.size >= 2 && it.groups[1] != null) {
+        result.add(CFunction(it.groups[1]!!.value, content))
+      }
+    }
+    functions = result
+    return result
+  }
+
+  fun getDef(): Map<String, List<String>> { // 获取所有的定义
+    val result = mutableMapOf<String, List<String>>()
+    functions.forEach {
+      result[it.name] = it.cParser.defineList
+    }
+    return result
+  }
+
+  fun getUse(): List<List<String>> {
+    val globalResult = mutableListOf<List<String>>()
+    functions.forEach {
+      val funcResult = mutableListOf<String>()
+
+      // 第一个处理参数
+      if (it.paramNameList.isEmpty()) {
+        funcResult.add("void")
+      } else {
+        it.paramNameList.forEach { param ->
+          funcResult.add("$param-def")
+        }
+      }
+
+      // 后面的
+      val useCache = StringBuilder()
+
+      it.cParser.sentenceList.forEach { sentence ->
+        when (sentence.type) {
+          CLanguage.Companion.OPERATION.FUNCTION_INVOCATION, CLanguage.Companion.OPERATION.RETURN -> {
+            if (useCache.isNotEmpty()) {
+              funcResult.add(useCache.toString())
+              useCache.clear() // 清空
+            }
+            funcResult.add("${sentence.right}-use")
+          }
+
+          CLanguage.Companion.OPERATION.DEFINE_VALUE, CLanguage.Companion.OPERATION.CHANGE_VALUE -> {
+            if (useCache.isNotEmpty()) {
+              funcResult.add(useCache.toString())
+              useCache.clear()
+            }
+            useCache.append("${sentence.left}-def")
+          }
+
+          CLanguage.Companion.OPERATION.DEFINE_VALUE_PARAM, CLanguage.Companion.OPERATION.CHANGE_VALUE_PARAM -> {
+            useCache.append(";${sentence.right}-use")
+          }
+        }
+      }
+      if (useCache.isNotEmpty()) {
+        funcResult.add(useCache.toString())
+      }
+      globalResult.add(funcResult)
+    }
+    return globalResult
+  }
+}
+
+fun main() {
+  val sourceFile = SourceFile(File("/home/kagura/repo/VariableRelation/src/main/CTests/test.c"))
+  val funcs = sourceFile.parseFunction()
+  funcs.forEach {
+    println("${it.name}(${it.params}) -> ${it.returnType} {\n${it.content}\n} ")
+//    it.cParser.sentenceList.forEach{ s->
+//      println("${s.left},${s.right},${s.type}")
+//    }
+    it.getTraceTree().print()
+  }
+
+  println(sourceFile.getDef())
+  println(sourceFile.getUse())
 }
\ No newline at end of file
diff --git a/src/main/kotlin/core/TraceTree.kt b/src/main/kotlin/core/TraceTree.kt
new file mode 100644
index 0000000..d8ec6b6
--- /dev/null
+++ b/src/main/kotlin/core/TraceTree.kt
@@ -0,0 +1,57 @@
+package core
+
+data class TraceTree(
+  val name: String,
+  var changedBy: TraceTree?,
+  var upperFuncName: String?
+)
+
+fun List<TraceTree>.findNode(name: String): TraceTree? {
+  for (tree in this) {
+    if (tree.name == name) {
+      return tree
+    }
+  }
+  return null
+}
+
+fun List<TraceTree>.print() {
+  fun traceChain(node: TraceTree?): String {
+    return if (node == null) {
+      "" // 读取完了
+    } else {
+      traceChain(node.changedBy) + if (node.changedBy != null) {
+        "->"
+      } else {
+        ""
+      } + node.name
+    }
+  }
+
+  this.forEach { traceTree ->
+    println(traceChain(traceTree))
+  }
+}
+
+fun List<TraceTree>.getDeepest(): List<TraceTree> {
+  // 使用 Map 记录每个节点的深度
+  val depthMap = mutableMapOf<TraceTree, Int>()
+
+  // 计算每个节点的深度（从终点向上追溯）
+  for (trace in this) {
+    var depth = 0
+    var current = trace
+    while (current.changedBy != null) {
+      depth++
+      current = current.changedBy!!
+    }
+    // 将链起点的深度记录在 depthMap 中
+    depthMap[trace] = depth
+  }
+
+  // 找到最大深度值
+  val maxDepth = depthMap.values.maxOrNull() ?: 0
+
+  // 返回具有最大深度的节点
+  return depthMap.filterValues { it == maxDepth }.keys.toList()
+}