聊聊Golang的特点及其写法实例

sudo apt-get install golang

go version

const PI = 3.1415
var name = "Golang"

func add(a int, b int) int {
    return a + b
}

a := 10
if a > 5 {
    fmt.Println("a大于5")
} else {
    fmt.Println("a小于等于5")
}

for i := 0; i < 10; i++ {
    fmt.Println(i)
}

switch a {
case 1:
    fmt.Println("a等于1")
case 2:
    fmt.Println("a等于2")
default:
    fmt.Println("a等于其他值")
}

func worker(id int, jobs <-chan int, results chan<- int) {
    for j := range jobs {
        fmt.Println("worker:", id, "开始工作，开始处理数据", j)
        time.Sleep(time.Second)
        fmt.Println("worker:", id, "工作完成")
        results <- j * 2
    }
}

func main() {
    jobs := make(chan int, 100)
    results := make(chan int, 100)

    for w := 0; w < 3; w++ {
        go worker(w, jobs, results)
    }

    for j := 0; j < 5; j++ {
        jobs <- j
    }
    close(jobs)

    for r := 0; r < 5; r++ {
        <- results
    }
}