gopl.io/ch2/tempconv0/celsius.go

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// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
// See page 39.
//!+
// Package tempconv performs Celsius and Fahrenheit temperature computations.
package tempconv
import "fmt"
type Celsius float64
type Fahrenheit float64
const (
AbsoluteZeroC Celsius = -273.15
FreezingC Celsius = 0
BoilingC Celsius = 100
)
func CToF(c Celsius) Fahrenheit { return Fahrenheit(c*9/5 + 32) }
func FToC(f Fahrenheit) Celsius { return Celsius((f - 32) * 5 / 9) }
//!-
func (c Celsius) String() string { return fmt.Sprintf("%g°C", c) }