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() {
if len(os.Args) != 2 {
fmt.Println("Gimme a month name.")
return
}
// m := os.Args[1]
// if m == "Dec" || m == "Jan" || m == "Feb" {
// fmt.Println("Winter")
// } else if m == "Mar" || m == "Apr" || m == "May" {
// fmt.Println("Spring")
// } else if m == "Jun" || m == "Jul" || m == "Aug" {
// fmt.Println("Summer")
// } else if m == "Sep" || m == "Oct" || m == "Nov" {
// fmt.Println("Fall")
// } else {
// fmt.Println("ERROR: not a month.")
// }
switch m := os.Args[1]; m {
case "Dec", "Jan", "Feb":
fmt.Println("Winter")
case "Mar", "Apr", "May":
fmt.Println("Spring")
case "Jun", "Jul", "Aug":
fmt.Println("Summer")
case "Sep", "Oct", "Nov":
fmt.Println("Fall")
default:
fmt.Printf("%q is not a month.\n", m)
}
}
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