输入任意小数使它保留俩位小数并四舍五入

输入一个任意小数使它保留俩位小数并四舍五入

public class doublee {
    public static void main(String[] args) {

        System.out.println("请输入一个小数");
        Scanner sc = new Scanner(System.in);
        double num = sc.nextDouble();
        num = (int)(num * 100 + 0.5);
        System.out.println(num/ 100.0);

    }