一个线程打印奇数一个线程打印偶数 交替打印

题目来源：字节跳动

答案：

package main
import (
    "fmt"
    "time"
)
var num = 100
func goroutine1(p chan int) {
    for i := 1; i <= num; i++ {
        p <- i
        if i%2 == 1 {
            fmt.Println("goroutine-1:", i)
        }
    }
}
func goroutine2(p chan int) {
    for i := 1; i <= num; i++ {
        <-p
        if i%2 == 0 {
            fmt.Println("goroutine-2:", i)
        }
    }
}
func main() {
    msg := make(chan int)
    go goroutine1(msg)
    go goroutine2(msg)
    time.Sleep(time.Second * 1)
}