From 4dd3c9650f8fd47a709204a52a32ddbf9ae1221c Mon Sep 17 00:00:00 2001
From: Shane Caldwell <shane@rigetti.com>
Date: Sun, 21 Mar 2021 18:19:47 -0700
Subject: [PATCH] Add Kelvin temperature type and converters

---
 ch2/tempconv/conv.go     | 12 ++++++++++++
 ch2/tempconv/tempconv.go |  2 ++
 2 files changed, 14 insertions(+)

diff --git a/ch2/tempconv/conv.go b/ch2/tempconv/conv.go
index 1ef1f9187..06991007e 100644
--- a/ch2/tempconv/conv.go
+++ b/ch2/tempconv/conv.go
@@ -10,7 +10,19 @@ package tempconv
 // CToF converts a Celsius temperature to Fahrenheit.
 func CToF(c Celsius) Fahrenheit { return Fahrenheit(c*9/5 + 32) }
 
+// CToK converts a Celsius temperature to Kelvin.
+func CToK(c Celsius) Kelvin { return Kelvin(c - Celsius(AbsoluteZeroC)) }
+
 // FToC converts a Fahrenheit temperature to Celsius.
 func FToC(f Fahrenheit) Celsius { return Celsius((f - 32) * 5 / 9) }
 
+// FToK converts a Fahrenheit temperature to Kelvin.
+func FToK(f Fahrenheit) Kelvin { return Kelvin(CToF(FToC(f))) }
+
+// KToC converts a Kelvin temperature to Celsius.
+func KToC(k Kelvin) Celsius { return Celsius(k + Kelvin(AbsoluteZeroC)) }
+
+// KToF converts a Kelvin temperature to Fahrenheit.
+func KToF(k Kelvin) Fahrenheit { return Fahrenheit(CToF(KToC(k))) }
+
 //!-
diff --git a/ch2/tempconv/tempconv.go b/ch2/tempconv/tempconv.go
index 5af1b6dee..1fed9ba07 100644
--- a/ch2/tempconv/tempconv.go
+++ b/ch2/tempconv/tempconv.go
@@ -10,6 +10,7 @@ import "fmt"
 
 type Celsius float64
 type Fahrenheit float64
+type Kelvin float64
 
 const (
 	AbsoluteZeroC Celsius = -273.15
@@ -19,5 +20,6 @@ const (
 
 func (c Celsius) String() string    { return fmt.Sprintf("%g°C", c) }
 func (f Fahrenheit) String() string { return fmt.Sprintf("%g°F", f) }
+func (k Kelvin) String() string     { return fmt.Sprintf("%g K", k) }
 
 //!-