package main

import "fmt"

func main() {
	type bigint int64 //给int64起一个别名为bigint
	
	var a bigint
	fmt.Printf("a1的类型为%T\n", a)  //输出main.bigint

	type (
		char byte
		long int
	)
	var (
		ch char = 'a'
		a1 long = 123123
	)
	fmt.Println("ch = ", ch, " a1 = ", a1)
}