From 3c981f9315ecee8db6e05a19db4302e5c85100fe Mon Sep 17 00:00:00 2001
From: yangyudong <916291030@qq.com>
Date: Thu, 10 Apr 2025 17:45:32 +0800
Subject: [PATCH] =?UTF-8?q?=E7=BB=93=E6=9E=84=E4=BD=93?=
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---
 02_core_concepts/02_structs/main.go    | 52 +++++++++++++++++++++-
 02_core_concepts/03_interfaces/main.go | 60 +++++++++++++++++++++++++-
 2 files changed, 108 insertions(+), 4 deletions(-)

diff --git a/02_core_concepts/02_structs/main.go b/02_core_concepts/02_structs/main.go
index 0db886e..c701aad 100644
--- a/02_core_concepts/02_structs/main.go
+++ b/02_core_concepts/02_structs/main.go
@@ -1,5 +1,53 @@
 package main
 
-func main() {
-	// TODO
+import "fmt"
+
+// 定义一个Person结构体
+type Person struct {
+	Name string
+	Age  int
+}
+
+// 给Person结构体定义一个方法
+func (p Person) Greet() {
+	fmt.Printf("Hello, my name is %s and I'm %d years old.\n", p.Name, p.Age)
+}
+
+// 嵌套结构体示例
+type Employee struct {
+	Person
+	JobTitle string
+}
+
+func main() {
+	// 结构体初始化方式1：字段顺序
+	p1 := Person{"Alice", 25}
+
+	// 结构体初始化方式2：字段名指定
+	p2 := Person{
+		Name: "Bob",
+		Age:  30,
+	}
+
+	// 访问结构体字段
+	fmt.Println(p1.Name) // Alice
+	fmt.Println(p2.Age)  // 30
+
+	// 调用结构体方法
+	p1.Greet() // Hello, my name is Alice and I'm 25 years old.
+	p2.Greet() // Hello, my name is Bob and I'm 30 years old.
+
+	// 嵌套结构体初始化
+	emp := Employee{
+		Person: Person{
+			Name: "Charlie",
+			Age:  35,
+		},
+		JobTitle: "Developer",
+	}
+
+	// 访问嵌套结构体字段
+	fmt.Println(emp.Name)     // Charlie (提升字段)
+	fmt.Println(emp.JobTitle) // Developer
+	emp.Greet()               // Hello, my name is Charlie and I'm 35 years old.
 }
diff --git a/02_core_concepts/03_interfaces/main.go b/02_core_concepts/03_interfaces/main.go
index 0db886e..f4caadf 100644
--- a/02_core_concepts/03_interfaces/main.go
+++ b/02_core_concepts/03_interfaces/main.go
@@ -1,5 +1,61 @@
 package main
 
-func main() {
-	// TODO
+import "fmt"
+
+// 定义一个接口
+type Shape interface {
+	Area() float64
+}
+
+// 定义一个结构体：Rectangle
+type Rectangle struct {
+	Width, Height float64
+}
+
+// 实现接口方法：Area
+func (r Rectangle) Area() float64 {
+	return r.Width * r.Height
+}
+
+// 定义另一个结构体：Circle
+type Circle struct {
+	Radius float64
+}
+
+// 实现接口方法：Area
+func (c Circle) Area() float64 {
+	return 3.14 * c.Radius * c.Radius
+}
+
+func main() {
+	// 创建接口类型的切片
+	shapes := []Shape{
+		Rectangle{Width: 10, Height: 5},
+		Circle{Radius: 7},
+	}
+
+	shapes2 := []Shape{
+		Rectangle{Width: 20, Height: 10},
+		Circle{Radius: 14},
+		Rectangle{Width: 30, Height: 15},
+		Rectangle{5, 5},
+	}
+
+	// 遍历并调用接口方法
+	for _, shape := range shapes {
+		fmt.Printf("Shape Area: %.2f\n", shape.Area())
+	}
+
+	// i := 0
+	// for {
+	// 	fmt.Printf("Shape Area: %.2f\n", shapes2[i].Area())
+	// 	i++
+	// 	if i >= len(shapes2) {
+	// 		break
+	// 	}
+	// }
+
+	for _, shape := range shapes2 {
+		fmt.Printf("%.2f\n", shape.Area())
+	}
 }