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Add Kelvin temperature type and converters #48

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Add Kelvin temperature type and converters #48

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12 changes: 12 additions & 0 deletions ch2/tempconv/conv.go
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Original file line number Diff line number Diff line change
Expand Up @@ -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))) }

//!-
2 changes: 2 additions & 0 deletions ch2/tempconv/tempconv.go
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Expand Up @@ -10,6 +10,7 @@ import "fmt"

type Celsius float64
type Fahrenheit float64
type Kelvin float64

const (
AbsoluteZeroC Celsius = -273.15
Expand All @@ -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) }

//!-