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"
"os"
)
func main() {
args := os.Args
if len(args) != 2 || len(args[1]) != 1 {
fmt.Println("Give me a letter")
return
}
// I didn't use a short-if here because, it's already
// hard to read. Do not make it harder.
s := args[1]
if s == "a" || s == "e" || s == "i" || s == "o" || s == "u" {
fmt.Printf("%q is a vowel.\n", s)
} else if s == "w" || s == "y" {
fmt.Printf("%q is sometimes a vowel, sometimes not.\n", s)
} else {
fmt.Printf("%q is a consonant.\n", s)
}
}
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