rune byte 别名

func tf() {
	s := "ab1"
	var b byte
	b = s[0]
	var i int
	i = 97
	var j int8
	j = 97
	var k int32
	k = 97
	var p int64
	p = 97
	var r rune
	r = 97
	print(b, i, j, k, p, r)
}