Go简单的Goroutine示例

最简单的，接下来，会是竞争，加锁。。。

package main

import (
	"fmt"
	"runtime"
	"sync"
)

var wg sync.WaitGroup

func main() {
	runtime.GOMAXPROCS(runtime.NumCPU())

	wg.Add(2)

	fmt.Println("Create Goroutines")
	go printPrime("A")
	go printPrime("B")

	fmt.Println("Waiting To Finish")
	wg.Wait()

	fmt.Println("\nTerminating Program")
}

func printPrime(prefix string) {
	defer wg.Done()
	next:
		for outer :=2; outer < 5000; outer++ {
			for inner := 2; inner < outer; inner++ {
				if outer%inner == 0 {
					continue next
				}
			}
			fmt.Printf("%s:%d,", prefix, outer)
		}
		fmt.Println("Completed", prefix)
}