《JAVA语言程序设计》(五)保留两位小数的操作

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;
//保留两位小数
System.out.println("tax is :" + (int)(tax * 100) / 100.0);
}
}