更新0512

source-code/ch14/1/main.go

@@ -0,0 +1,24 @@
+package main
+
+import "fmt"
+
+func main() {
+
+	switch a := 1; {
+	case a == 1:
+		fmt.Println("The integer was == 1")
+		fallthrough
+	case a == 2:
+		fmt.Println("The integer was == 2")
+	case a == 3:
+		fmt.Println("The integer was == 3")
+		fallthrough
+	case a == 4:
+		fmt.Println("The integer was == 4")
+	case a == 5:
+		fmt.Println("The integer was == 5")
+		fallthrough
+	default:
+		fmt.Println("default case")
+	}
+}

source-code/ch14/2/main.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+func main() {
+	var c1, c2, c3 chan int
+	var i1, i2 int
+	select {
+	case i1 = <-c1:
+		fmt.Printf("received ", i1, " from c1\n")
+	case c2 <- i2:
+		fmt.Printf("sent ", i2, " to c2\n")
+	case i3, ok := (<-c3):
+		if ok {
+			fmt.Printf("received ", i3, " from c3\n")
+		} else {
+			fmt.Printf("c3 is closed\n")
+		}
+	case <-time.After(time.Second * 3): //超时退出
+		fmt.Println("request time out")
+	}
+}