《JAVA語言程序設計》(五)保留兩位小數的操作

public class SalesTax {
    public static void  main(String[] args){
        Scanner in = new Scanner(System.in);
        System.out.println("please enter the amount:");
        double purchaseAmount = in.nextDouble();
        double tax = purchaseAmount * 0.06;
        //保留兩位小數
        System.out.println("tax is :" + (int)(tax * 100) / 100.0);
    }
}