go main

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"

func main() {
	fmt.Println("Hello!")

	// two files belong to the same package
	// calling `bye()` of bye.go here
	bye()
}

// EXERCISE: Remove the comments from the below function
//           And analyze the error message

// func bye() {
// 	fmt.Println("Bye!")
// }

// ***** EXPLANATION *****
//
// ERROR: "bye" function "redeclared"
//        in "this block"
//
// "this block" means = "main package"
//
// "redeclared" means = you're using the same name
//   in the same scope again
//
// main package's scope is:
// all source-code files which are in the same main package

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go bye

go hey