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"
)
// 注意: 至少要用3个参数来运行这个程序
// 否则它会报错
func main() {
fmt.Printf("%#v\n", os.Args)
// 从 os.Args 字符串切片中获取一个 item
// os.Args[INDEX]
// INDEX 可以是 0 或者更大
fmt.Println("Path:", os.Args[0])
fmt.Println("1st argument:", os.Args[1])
fmt.Println("2nd argument:", os.Args[2])
fmt.Println("3rd argument:", os.Args[3])
// `len` 可以知道有多少个 item 在切片值中
fmt.Println("Items inside os.Args:", len(os.Args))
}
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