43 lines
687 B
Go
43 lines
687 B
Go
// For more tutorials: https://blog.learngoprogramming.com
|
|
//
|
|
// Copyright © 2018 Inanc Gumus
|
|
// Learn Go Programming Course
|
|
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
|
|
//
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
const usage = `
|
|
Feet to Meters
|
|
--------------
|
|
This program converts feet into meters.
|
|
|
|
Usage:
|
|
feet [feetsToConvert]`
|
|
|
|
func main() {
|
|
if len(os.Args) < 2 {
|
|
fmt.Println(strings.TrimSpace(usage))
|
|
return
|
|
}
|
|
|
|
arg := os.Args[1]
|
|
|
|
feet, err := strconv.ParseFloat(arg, 64)
|
|
if err != nil {
|
|
fmt.Printf("error: '%s' is not a number.\n", arg)
|
|
return
|
|
}
|
|
|
|
meters := feet * 0.3048
|
|
|
|
fmt.Printf("%g feet is %g meters.\n", feet, meters)
|
|
}
|