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