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func main() {
var wg sync.WaitGroup
wg.Add(1)
go func() {
fmt.Println("1")
wg.Done()
}()
wg.Wait()
wg.Add(1)
go func() {
fmt.Println("2")
wg.Done()
}()
wg.Wait()
wg.Add(1)
go func() {
fmt.Println("3")
wg.Done()
}()
wg.Wait()
}

recover 退出錯誤函數，繼續主線程代碼

ype Cat struct {
name string
age int
location string
}

func (Cat *Cat) Grow() {

}

func (Cat *Cat) Move(string) string {
return "Hello World"
}

func main() {
var wg sync.WaitGroup
wg.Add(3)
go func() {
fmt.Println("1")
wg.Done()
}()
go func() {
time.Sleep(100 * time.Millisecond)
fmt.Println("2")

wg.Done()
}()
go func() {
time.Sleep(200 * time.Millisecond)
fmt.Println("3")

wg.Done()
}()
wg.Wait()
}