Go用两个协程交替打印100以内的奇偶数的方法详解

package main
import (
	"fmt"
	"time"
)
var flagChan = make(chan int)
func wokr1() {
	for i := 1; i <= 100; i++ {
		flagChan <- 666 // 塞入
		if i%2 == 1 {
			fmt.Println("协程1打印:", i)
		}
	}
}
func wokr2() {
	for i := 1; i <= 100; i++ {
		_ = <-flagChan // 取出
		if i%2 == 0 {
			fmt.Println("协程2打印:", i)
		}
	}
}
func main() {
	go wokr1()
	go wokr2()
	time.Sleep(3 * time.Second) // 可以通过sync.WaitGroup或者另外一个channel来控制主协程的退出
}

package main
import (
	"fmt"
	"time"
)
func main() {
	c := make(chan int)
	go func() {
		for i := 1; i < 101; i++ {
			c <- 666
			//奇数
			if i%2 == 1 {
				fmt.Println("协程1打印:", i)
			}
		}
	}()
	go func() {
		for i := 1; i < 101; i++ {
			<-c
			//偶数
			if i%2 == 0 {
				fmt.Println("协程2打印:", i)
			}
		}
	}()
	time.Sleep(3 * time.Second)
}

package main
import (
	"fmt"
	"runtime"
	"time"
)
func main() {
	//设置可同时使用的CPU核数为1
	runtime.GOMAXPROCS(1)
	go func() {
		for i := 1; i < 101; i++ {
			//奇数
			if i%2 == 1 {
				fmt.Println("协程1打印:", i)
			}
			//让出cpu
			runtime.Gosched()
		}
	}()
	go func() {
		for i := 1; i < 101; i++ {
			//偶数
			if i%2 == 0 {
				fmt.Println("协程2打印:", i)
			}
			//让出cpu
			runtime.Gosched()
		}
	}()
	time.Sleep(3 * time.Second)
}

package main
import (
	"fmt"
	"time"
)
func main() {
	sli := make([]int, 100)
	for k := 0; k < 100; k++ {
		sli[k] = k * 10
	}
	// 交替打印sli这个切片中奇偶数位元素的值
	// fmt.Println(len(sli)) //100
	c := make(chan int)
	go func() {
		for i := 0; i < len(sli); i++ {
			c <- 666
			//奇数
			if i%2 == 1 {
				fmt.Println("协程1打印:", sli[i])
			}
		}
	}()
	go func() {
		for i := 0; i < len(sli); i++ {
			<-c
			//偶数
			if i%2 == 0 {
				fmt.Println("协程2打印:", sli[i])
			}
		}
	}()
	time.Sleep(3 * time.Second)
}