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 (
"os"
"strings"
)
// NOTE: You should always pass it at least one argument
func main() {
msg := os.Args[1]
// it's important to calculate things only once
// so, do not call the repeat function twice
// calling it once is enough
marks := strings.Repeat("!", len(msg))
s := marks + msg + marks
s = strings.ToUpper(s)
// you can also type this program more concisely
// like this:
//
// msg := strings.ToUpper(os.Args[1])
// marks := strings.Repeat("!", len(msg))
// fmt.Println(marks + msg + marks)
}
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