diff --git a/README.md b/README.md
index 92d15bc..6dcffc0 100644
--- a/README.md
+++ b/README.md
@@ -193,6 +193,41 @@ println("Hello", 42)  // 输出: Hello42\n
 | 13     | <<=    | a <<= 1        | a = a << 1             |
 | 13     | >>=    | a >>= 1        | a = a >> 1             |
 
+### 1.6 函数
+
+函数声明语法如下
+
+````
+fn 函数名(参数名:参数类型,....) -> 返回类型 {
+	...
+}
+````
+
+> 注意：最后一个表达式如果没有分号，其值默认为返回值
+
+例子：
+
+```
+fn add(x:i8, y:i8) -> i8 {
+	x+y
+}
+```
+
+### 1.7 结构体
+
+结构体声明语法如下
+
+```
+struct point {
+	x:i8,
+	y:i8
+}
+
+a = point {x:24, y:43};
+```
+
+
+
 ## 2. 实现细节
 
 ### 2.1 词法分析的符号表结构
@@ -273,6 +308,7 @@ println("Hello", 42)  // 输出: Hello42\n
 | 40 | ] |
 | 41 | ? |
 | 42 | : |
+| 43 | -> |
 
 #### 常量表
 
diff --git a/include/Scanner.h b/include/Scanner.h
index 9d8988a..9b0cb08 100644
--- a/include/Scanner.h
+++ b/include/Scanner.h
@@ -4,6 +4,11 @@
 #include "Tbs.h"
 class Scanner {
 public:
-    bool scan(std::string org_s,Tbs& t);
+    Scanner(std::string source_code) 
+        : m_source_code(source_code) {}
 
+    int is_int(int index);
+private:
+    std::string m_source_code;
+    int index;
 };
\ No newline at end of file
diff --git a/src/Scanner.cpp b/src/Scanner.cpp
index 3d1a5c9..8b6e530 100644
--- a/src/Scanner.cpp
+++ b/src/Scanner.cpp
@@ -2,17 +2,5 @@
 
 using std::vector,std::string;
 
-bool Scanner::scan(std::string org_s,Tbs&  t) {
-    string tmp;
-    int cnt = 0;
-    for (auto e : org_s) {
-        if (e==' ') {
-            t.ConstTable[++cnt]  =tmp;
-            tmp = "";
-        }
-        else {
-            tmp += e;
-        }
-    }
-    return true;
+int Scanner::is_int(int index) {
 }