GoLang函数参数的传递练习

春节买的GO方面的书，看了一次。现在撸一些代码，作为练习。

// Copyright © 2019 NAME HERE <EMAIL ADDRESS>
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package main

import "fmt"

func chvalue(a int) int {
	a = a + 1
	return a
}

func chpointer(a *int) {
	*a = *a + 1
	return
}

func suma(arr ...int) (sum int) {
	for _, v := range arr {
		sum += v
	}
	return
}

func sumb(arr []int) (sum int) {
	for _, v:= range arr {
		sum += v
	}
	return
}

func main() {
	type User struct {
		name string
		age int
	}
	andes := User{
		name: "andes",
		age: 18,
	}
	p := &andes
	println(p.name, p.age)

	a := 10
	chvalue(a)
	fmt.Println(a)

	chpointer(&a)
	fmt.Println(a)

	slice := []int{1, 2, 30, 4}
	array := []int {1000, 2, 3, 17, 50}

	fmt.Println(suma(slice...))
	fmt.Println(sumb(array))

	fmt.Printf("%T\n", suma)
	fmt.Printf("%T\n", sumb)
}