Update

stage06-oop/03-embedding/main.go

@@ -0,0 +1,182 @@
+package main
+
+import "fmt"
+
+type Address struct {
+	City   string
+	Street string
+}
+
+type Person struct {
+	Name    string
+	Age     int
+	Address Address
+}
+
+type Employee struct {
+	Person
+	EmployeeID int
+	Department string
+}
+
+type Employee2 struct {
+	____
+	Salary float64
+}
+
+type Reader interface {
+	Read() string
+}
+
+type Writer interface {
+	Write(s string)
+}
+
+type File struct {
+	Name    string
+	Content string
+}
+
+func (f File) Read() string {
+	return f.___
+}
+
+func (f *File) Write(s string) {
+	f.Content = ____
+}
+
+type ReadWriter interface {
+	____
+	____
+}
+
+func exercise1() string {
+	fmt.Println("=== 练习1：结构体嵌入 ===")
+
+	emp := Employee{
+		Person: Person{
+			Name: "张三",
+			Age:  30,
+		},
+		EmployeeID: 1001,
+		Department: "技术部",
+	}
+
+	fmt.Printf("员工姓名: %s, 年龄: %d\n", ____, emp.___)
+
+	return ____
+}
+
+func exercise2() string {
+	fmt.Println("=== 练习2：多层嵌入 ===")
+
+	address := Address{City: "北京", Street: "长安街"}
+
+	emp2 := Employee2{
+		Person: Person{
+			Name:    "李四",
+			Address: ____,
+		},
+		Salary: 10000.0,
+	}
+
+	fmt.Printf("员工: %s, 城市: %s\n", emp2.___, emp2.___.City)
+
+	return ____
+}
+
+func exercise3() string {
+	fmt.Println("=== 练习3：接口实现 ===")
+
+	file := File{Name: "test.txt", Content: "初始内容"}
+
+	// 使用Read方法
+	content := file.____()
+	fmt.Printf("读取内容: %s\n", content)
+
+	// 使用Write方法
+	file.____("新内容")
+	fmt.Printf("写入后内容: %s\n", file.___)
+
+	return ___
+}
+
+func exercise4() string {
+	fmt.Println("=== 练习4：接口组合 ===")
+
+	file := &File{Name: "data.txt", "原始数据"}
+
+	var rw _____
+
+	rw.Write("修改后的数据")
+	result := rw.Read()
+
+	fmt.Printf("读写结果: %s\n", result)
+
+	return ____
+}
+
+func exercise5() string {
+	fmt.Println("=== 练习5：类型断言 ===")
+
+	var data interface{} = "Hello, Go!"
+
+	// 尝试断言为string
+	str, ok := data.____
+	if ok {
+		fmt.Printf("类型断言成功: %s\n", ____)
+	}
+
+	// 尝试断言为int
+	_, ok = data.____
+	if !ok {
+		fmt.Println("类型断言失败: 不是int类型")
+	}
+
+	return "类型断言演示完成"
+}
+
+func exercise6() string {
+	fmt.Println("=== 练习6：类型选择 ===")
+
+	values := []interface{}{10, "hello", 3.14, true}
+
+	for _, v := range ____ {
+		switch v.(type) {
+		case int:
+			fmt.Printf("整数: %d\n", ____)
+		case string:
+			fmt.Printf("字符串: %s\n", ____)
+		case float64:
+			fmt.Printf("浮点数: %.2f\n", ____)
+		case bool:
+			fmt.Printf("布尔值: %t\n", ____)
+		default:
+			fmt.Println("未知类型")
+		}
+	}
+
+	return "类型选择演示完成"
+}
+
+func main() {
+	fmt.Println("=== 组合与类型断言 练习 ===\n")
+
+	result1 := exercise1()
+	fmt.Printf("练习1结果: %s\n", result1)
+
+	result2 := exercise2()
+	fmt.Printf("练习2结果: %s\n", result2)
+
+	result3 := exercise3()
+	fmt.Printf("练习3结果: %s\n", result3)
+
+	result4 := exercise4()
+	fmt.Printf("练习4结果: %s\n", result4)
+
+	result5 := exercise5()
+	fmt.Printf("练习5结果: %s\n", result5)
+
+	result6 := exercise6()
+	fmt.Printf("练习6结果: %s\n", result6)
+}