good good study, day day up!

vendor/gopl.io/ch7/tempflag/tempflag.go

@@ -0,0 +1,24 @@
+// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+// See page 181.
+
+// Tempflag prints the value of its -temp (temperature) flag.
+package main
+
+import (
+	"flag"
+	"fmt"
+
+	"gopl.io/ch7/tempconv"
+)
+
+//!+
+var temp = tempconv.CelsiusFlag("temp", 20.0, "the temperature")
+
+func main() {
+	flag.Parse()
+	fmt.Println(*temp)
+}
+
+//!-