day10协程 串联 channel

src/study/day10Goroutines/LinkChannels.go

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+package main
+
+// Channels 可以用于多个goroutine之间的数据交换
+func main() {
+	natural := make(chan int)
+	square := make(chan int)
+
+	// counter
+	go func() {
+		for x := 0; x <= 100; x++ {
+			natural <- x
+		}
+		close(natural) // 关闭channel
+	}()
+
+	// squarer
+	go func() {
+		for {
+			x, ok := <-natural
+			if !ok {
+				break // channel关闭，跳出循环
+			}
+			square <- x * x
+		}
+		close(square)
+	}()
+
+	// printer (in main goroutine)
+	for {
+		x, ok := <-square
+		if !ok {
+			break
+		}
+		println(x)
+	}
+}