go工程师代码面试题总结(未完待续)

以下代码能否正确输出？如果能，请说明

func Add(a int, b int) int {
	c := a + b
	fmt.Println(a, b, c)
	return c
}

func TestAdd(t *testing.T) {
	a := 2
	b := 4
	defer Add(a, b)
	a = 3
	defer Add(a, b)
	b = 5
}

eg：

=== RUN   TestAdd
3 4 7
2 4 6
--- PASS: TestAdd (0.00s)
PASS

Process finished with exit code 0

一个日志记录服务，每满100条返回一次，或者超出1s返回一次，该服务如何实现，请写出主要代码，要求使用 channel，sync.WaitGroup

eg：

func TestPrintLog(t *testing.T) {
	var ch = make(chan string, 100)
	var wg sync.WaitGroup
	wg.Add(2)
	go send(ch, &wg)
	go receive(ch, &wg)

	wg.Wait()
	fmt.Println("over")

	defer close(ch)
}

func send(ch chan string, wg *sync.WaitGroup) {
	for i := 0; i < 10000; i++ {
		ch <- "消息：" + strconv.Itoa(i)
	}
	wg.Done()
}

func receive(ch chan string, wg *sync.WaitGroup) {
	var loglist [100]string
	y := 0
	for {
		if y >= 10000 {
			fmt.Println("y >= 10000",y)
			wg.Done()
			return
		}
		for i := 0; i < 100; i++ {
			select {
			case loglist[i] = <-ch:
				y++
			case <-time.After(time.Second * 1):
				return
			}
		}
		fmt.Println(loglist)
	}
}