good good study, day day up!

vendor/gopl.io/ch2/tempconv/tempconv.go

@@ -0,0 +1,23 @@
+// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+//!+
+
+// Package tempconv performs Celsius and Fahrenheit conversions.
+package tempconv
+
+import "fmt"
+
+type Celsius float64
+type Fahrenheit float64
+
+const (
+	AbsoluteZeroC Celsius = -273.15
+	FreezingC     Celsius = 0
+	BoilingC      Celsius = 100
+)
+
+func (c Celsius) String() string    { return fmt.Sprintf("%g°C", c) }
+func (f Fahrenheit) String() string { return fmt.Sprintf("%g°F", f) }
+
+//!-