main.go 源码
// Copyright © 2018 Inanc Gumus
// Learn Go Programming Course
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
//
// For more tutorials : https://learngoprogramming.com
// In-person training : https://www.linkedin.com/in/inancgumus/
// Follow me on twitter: https://twitter.com/inancgumus
package main
import (
"fmt"
"math"
"os"
"strconv"
)
// I copied the same program here but without comments.
// So, you can easily read it.
func main() {
const (
feetInMeters float64 = 0.3048
feetInYards = feetInMeters / 0.9144
)
arg := os.Args[1]
feet, _ := strconv.ParseFloat(arg, 64)
meters := feet * feetInMeters
yards := math.Round(feet * feetInYards)
fmt.Printf("%g feet is %g meters.\n", feet, meters)
fmt.Printf("%g feet is %g yards.\n", feet, yards)
}
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