Go中變數的作用域

摘要： package main import ( "fmt" ) //不同作用域同名變數 var a int //全域性變數的宣告 func test01(a float32) { fmt.Printf("a type = %T\n", a) } ...

package main

import (
"fmt"
)

//不同作用域同名變數
var a int //全域性變數的宣告
func test01(a float32) {
fmt.Printf("a type = %T\n", a)
}

func main() {
fmt.Printf("a type = %T\n", a)
var a uint8 //區域性變數宣告
{
var a float64 //區域性變數宣告
fmt.Printf("a type = %T\n", a)
}
fmt.Printf("a type =%T\n", a)

test01(3.14)
test02()
}

func test02() {
fmt.Printf("a type = %T\n", a)
}

//執行結果如下：
//a type = int
//a type = float64
//a type =uint8
//a type = float32
//a type = int