'init'

demo/test.go

@@ -0,0 +1,52 @@
+package main
+
+import "fmt"
+
+// 接口定义设计规范
+type SayHello interface {
+	SayHello()
+}
+type American struct {
+	Name string
+}
+
+func (person American) SayHello() {
+	fmt.Println("你好")
+}
+
+type chinese struct {
+	Name string
+}
+
+func (person chinese) SayHello() {
+	fmt.Println("chinese")
+}
+func (person chinese) tiaowu() {
+	fmt.Println("跳舞")
+}
+
+// 定义函数：接收接口的实例
+func greet(s SayHello) {
+	s.SayHello()
+
+	//断言控制语句的要求 判断这是chinese
+	ch, flag := s.(chinese)
+	if flag == true {
+
+		ch.tiaowu()
+	} else {
+		fmt.Println("no")
+	}
+}
+
+func main() {
+	var a [3]SayHello
+	a[0] = chinese{"1"}
+	a[1] = American{"hel"}
+	a[0].SayHello()
+
+	c := chinese{}
+	c.tiaowu()
+	c.SayHello()
+
+}