diff --git a/LeetCode/Ex.2/main.go b/LeetCode/Ex.2/main.go
new file mode 100644
index 0000000..c268973
--- /dev/null
+++ b/LeetCode/Ex.2/main.go
@@ -0,0 +1,23 @@
+package main
+
+/**
+给你两个非空 的链表，表示两个非负的整数。
+它们每位数字都是按照逆序的方式存储的，并且每个节点只能存储一位数字。
+请你将两个数相加，并以相同形式返回一个表示和的链表。 你可以假设除了数字 0 之外，这两个数都不会以 0开头。
+*/
+func main() {
+
+}
+
+//type ListNode
+
+/**
+ * Definition for singly-linked list.
+ * type ListNode struct {
+ *     Val int
+ *     Next *ListNode
+ * }
+ */
+//func addTwoNumbers(l1 *ListNode, l2 *ListNode) *ListNode {
+//	return nil
+//}
diff --git a/Point/main.go b/Point/main.go
new file mode 100644
index 0000000..766cd7c
--- /dev/null
+++ b/Point/main.go
@@ -0,0 +1,40 @@
+package main
+
+import "fmt"
+
+/**
+new与make的区别:
+1. 二者都是用来做内存分配的。
+2. make只用于slice、map以及channel的初始化，返回的还是这三个引用类型本身；
+3. 而new用于类型的内存分配，并且内存对应的值为类型零值，返回的是指向类型的指针。
+*/
+func main() {
+	a := 10
+	b := &a
+	fmt.Printf("%v, %p\n", a, b)
+	fmt.Printf("a: %T, b: %T\n", a, b)
+	fmt.Printf("%v\n", *b)
+	modify1(a)
+	fmt.Printf("%v\n", a)
+	modify2(&a)
+	fmt.Printf("%v\n", a)
+	//Go中 引用类型的比变量不仅不要声明，还需要对其分配内存空间，否则将无法存储
+	//而值类型则不需要分配内存空间
+	//var m *int //未分配内存空间
+	m := new(int)
+	*m = 150
+	fmt.Println(*m)
+
+	//var mm map[string]int//为分配内存空间
+	mm := make(map[string]int)
+	mm["123"] = 1233
+	fmt.Println(mm)
+}
+
+func modify1(num int) {
+	num = 20
+}
+
+func modify2(num *int) {
+	*num = 100
+}
diff --git a/Struct/exerices.go b/Struct/exerices.go
new file mode 100644
index 0000000..617bbe8
--- /dev/null
+++ b/Struct/exerices.go
@@ -0,0 +1,24 @@
+package main
+
+import "fmt"
+
+type student struct {
+	name string
+	age  int
+}
+
+func main() {
+	m := make(map[string]*student)
+	stus := []student{
+		{name: "小王子", age: 18},
+		{name: "娜扎", age: 23},
+		{name: "大王八", age: 9000},
+	}
+
+	for _, stu := range stus {
+		m[stu.name] = &stu
+	}
+	for k, v := range m {
+		fmt.Println(k, "=>", v.name)
+	}
+}
diff --git a/Struct/exerices2.go b/Struct/exerices2.go
new file mode 100644
index 0000000..4398921
--- /dev/null
+++ b/Struct/exerices2.go
@@ -0,0 +1,64 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+/**
+使用“面向对象”的思维方式编写一个学生信息管理系统。
+学生有id、姓名、年龄、分数等信息
+程序提供展示学生列表、添加学生、编辑学生信息、删除学生等功能
+*/
+
+type ExStudent struct {
+	ID, Age, Score, Name string
+}
+
+func main() {
+	var str string
+	exStuArr := make([]ExStudent, 0, 20)
+	in := bufio.NewScanner(os.Stdin)
+	for true {
+		fmt.Println("=== 学生管理系统 ===")
+		fmt.Println("*   1. 展示学生    *")
+		fmt.Println("*   2. 添加学生    *")
+		fmt.Println("*   3. 编辑学生    *")
+		fmt.Println("*   4. 删除学生    *")
+		fmt.Println("====================")
+		fmt.Println("请输入编号:")
+		if in.Scan() {
+			str = in.Text()
+		}
+		switch str {
+		case "1":
+			for _, v := range exStuArr {
+				fmt.Printf("ID: %v\nName: %v\nAge: %v\nScore: %v\n", v.ID, v.Name, v.Age, v.Score)
+			}
+			break
+		case "2":
+			exStu := ExStudent{}
+			fmt.Println("请输入ID:")
+			if in.Scan() {
+				exStu.ID = in.Text()
+			}
+			fmt.Println("请输入Age:")
+			if in.Scan() {
+				exStu.Age = in.Text()
+			}
+			fmt.Println("请输入Name:")
+			if in.Scan() {
+				exStu.Name = in.Text()
+			}
+			fmt.Println("请输入Score:")
+			if in.Scan() {
+				exStu.Score = in.Text()
+			}
+			exStuArr = append(exStuArr, exStu)
+			for _, v := range exStuArr {
+				fmt.Printf("ID: %v\nName: %v\nAge: %v\nScore: %v\n", v.ID, v.Name, v.Age, v.Score)
+			}
+		}
+	}
+}
diff --git a/Struct/json.go b/Struct/json.go
new file mode 100644
index 0000000..350b2c7
--- /dev/null
+++ b/Struct/json.go
@@ -0,0 +1,51 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+type Student struct {
+	ID     int
+	Gender string
+	Name   string
+}
+type Class struct {
+	Title   string
+	Student []*Student
+}
+
+func main() {
+	c := &Class{
+		Title:   "101",
+		Student: make([]*Student, 0, 200),
+	}
+	for i := 0; i < 10; i++ {
+		stu := &Student{
+			ID:     i,
+			Gender: "男",
+			Name:   fmt.Sprintf("stu%02d", i),
+		}
+		c.Student = append(c.Student, stu)
+	}
+	//for _, v := range c.Student {
+	//	fmt.Printf("%#v\n", v)
+	//}
+	data, err := json.Marshal(c)
+	if err != nil {
+		fmt.Println("json marshal failed")
+		return
+	}
+	fmt.Printf("JSON:\n %s\n", data)
+
+	str := `{"Title":"101","Student":[{"ID":0,"Gender":"男","Name":"stu00"},{"ID":1,"Gender":"男","Name":"stu01"}]}`
+	c1 := &Class{}
+	err = json.Unmarshal([]byte(str), c1)
+	if err != nil {
+		fmt.Println("json unmarshal failed")
+		return
+	}
+	for _, v := range c1.Student {
+		fmt.Printf("%#v\n", v)
+	}
+}
diff --git a/Struct/main.go b/Struct/main.go
new file mode 100644
index 0000000..17ab0b4
--- /dev/null
+++ b/Struct/main.go
@@ -0,0 +1,20 @@
+package main
+
+import "fmt"
+
+/*
+struct是值类型
+*/
+
+// NewInt 类型定义
+type NewInt int
+
+// MyInt 类型别名
+type MyInt = int
+
+func main() {
+	var a NewInt
+	var b MyInt
+
+	fmt.Printf("a: %T, b: %T\n", a, b)
+}
diff --git a/Struct/methord.go b/Struct/methord.go
new file mode 100644
index 0000000..131fe8d
--- /dev/null
+++ b/Struct/methord.go
@@ -0,0 +1,41 @@
+package main
+
+import "fmt"
+
+// Person
+/**
+Go语言中的方法（Method）是一种作用于特定类型变量的函数。
+这种特定类型变量叫做接收者（Receiver）。
+接收者的概念就类似于其他语言中的this或者 self。
+*/
+type Person struct {
+	name string
+	age  int
+}
+
+func newPerson2(name string, age int) *Person {
+	return &Person{
+		name: name,
+		age:  age,
+	}
+}
+
+// Dream 方法
+func (p Person) Dream() {
+	fmt.Printf("%s 好好学习\n", p.name)
+}
+
+//指针类型接收者 =>
+//1.因为结构体是值类型，当需要修改接收者中的值的时候，需要使用指针类型的接收者
+//2.接收者是拷贝代价比较大的大对象
+//3.保证一致性，如果有某个方法使用了指针接收者，那么其他的方法也应该使用指针接收者。
+func (p *Person) setAge(nAge int) {
+	p.age = nAge
+}
+
+func main() {
+	p1 := newPerson2("song", 18)
+	p1.Dream()
+	p1.setAge(20)
+	fmt.Printf("p1: %v", p1.age)
+}
diff --git a/Struct/struct1.go b/Struct/struct1.go
new file mode 100644
index 0000000..59f4ce3
--- /dev/null
+++ b/Struct/struct1.go
@@ -0,0 +1,50 @@
+package main
+
+import "fmt"
+
+type person struct {
+	city, name string
+	age        int
+}
+
+func main() {
+	//基本实例化
+	var p1 person //没有初始化的结构体，其成员变量都是对应其类型的零值。
+	p1.age = 10
+	p1.city = "anhui"
+	p1.name = "ld"
+
+	//匿名结构体
+	var user struct {
+		name string
+		age  int
+	}
+	user.age = 10
+	user.name = "username"
+	fmt.Println(p1, user)
+
+	//创建指针类型结构体
+	var p2 = new(person)
+	fmt.Printf("p2: %T\n", p2)
+	fmt.Printf("p2: %#v\n", p2)
+
+	//取结构体地址的实例化
+	p3 := &person{}
+	fmt.Printf("p3: %T\n", p3)
+	fmt.Printf("p3: %#v\n", p3)
+	p3.age = 18 //本质在底层是执行的 (*p3).age = 18
+	p3.city = "beijing"
+	p3.name = "zhang san"
+	fmt.Printf("p3: %#v\n", p3)
+
+	p4 := newPerson("p4", "suzhou", 22)
+	fmt.Printf("p4: %#v\n", p4)
+}
+
+func newPerson(name, city string, age int) *person {
+	return &person{
+		city: city,
+		name: name,
+		age:  age,
+	}
+}
diff --git a/Struct/struct2.go b/Struct/struct2.go
new file mode 100644
index 0000000..eaef87e
--- /dev/null
+++ b/Struct/struct2.go
@@ -0,0 +1,36 @@
+package main
+
+import "fmt"
+
+// Person2 匿名结构体
+type Person2 struct {
+	string
+	int
+}
+
+// Address 嵌套结构体
+type Address struct {
+	Province, City string
+}
+type User struct {
+	Name string
+	Age  int
+	Address
+}
+
+func main() {
+	p1 := Person2{
+		"132",
+		18,
+	}
+	fmt.Printf("p1: %#v\n", p1)
+	user := User{
+		Name: "song",
+		Age:  18,
+		Address: Address{
+			Province: "anhui",
+			City:     "An qing",
+		},
+	}
+	fmt.Printf("%#v\n", user.City)
+}
diff --git a/Struct/structEx.go b/Struct/structEx.go
new file mode 100644
index 0000000..d584e1f
--- /dev/null
+++ b/Struct/structEx.go
@@ -0,0 +1,25 @@
+package main
+
+import "fmt"
+
+type Person3 struct {
+	name   string
+	age    int8
+	dreams []string
+}
+
+func (p *Person3) SetDreams(dreams []string) {
+	//p.dreams = dreams
+	p.dreams = make([]string, len(dreams))
+	copy(p.dreams, dreams)
+}
+
+func main() {
+	p1 := Person3{name: "小王子", age: 18}
+	data := []string{"吃饭", "睡觉", "打豆豆"}
+	p1.SetDreams(data)
+
+	// 你真的想要修改 p1.dreams 吗？
+	data[1] = "不睡觉"
+	fmt.Println(p1.dreams) // ?
+}
diff --git a/Struct/structExtends.go b/Struct/structExtends.go
new file mode 100644
index 0000000..dbddae2
--- /dev/null
+++ b/Struct/structExtends.go
@@ -0,0 +1,33 @@
+package main
+
+import "fmt"
+
+//Animal 动物
+type Animal struct {
+	name string
+}
+
+func (a *Animal) move() {
+	fmt.Printf("%s会动！\n", a.name)
+}
+
+//Dog 狗
+type Dog struct {
+	Feet    int8
+	*Animal //通过嵌套匿名结构体实现继承
+}
+
+func (d *Dog) wang() {
+	fmt.Printf("%s会汪汪汪~\n", d.name)
+}
+
+func main() {
+	d1 := &Dog{
+		Feet: 4,
+		Animal: &Animal{ //注意嵌套的是结构体指针
+			name: "乐乐",
+		},
+	}
+	d1.wang() //乐乐会汪汪汪~
+	d1.move() //乐乐会动！
+}
diff --git a/Struct/structTag.go b/Struct/structTag.go
new file mode 100644
index 0000000..a6fb70a
--- /dev/null
+++ b/Struct/structTag.go
@@ -0,0 +1,33 @@
+package main
+
+/**
+Tag是结构体的元信息，可以在运行的时候通过反射的机制读取出来。 Tag在结构体字段的后方定义，由一对反引号包裹起来，具体的格式如下：
+
+`key1:"value1" key2:"value2"`
+*/
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+// Student2 学生
+type Student2 struct {
+	ID     int    `json:"id"` //通过指定tag实现json序列化该字段时的key
+	Gender string //json序列化是默认使用字段名作为key
+	name   string //私有不能被json包访问
+}
+
+func main() {
+	s1 := Student2{
+		ID:     1,
+		Gender: "男",
+		name:   "沙河娜扎",
+	}
+	data, err := json.Marshal(s1)
+	if err != nil {
+		fmt.Println("json marshal failed!")
+		return
+	}
+	fmt.Printf("json str:%s\n", data) //json str:{"id":1,"Gender":"男"}
+}