string反序

var t string = "123456你好"

tmp := []rune(t)

for from, to := 0, len(tmp)-1; from < to; from, to = from + 1, to - 1{

    fmt.Println(from, to)

    //x := tmp[from]

    //tmp[from] = tmp[to]

    //tmp[to] = x

    tmp[from], tmp[to] = tmp[to],tmp[from]

}

fmt.Println(string(tmp))