taxcalc.java

来自「Beginning Java 2, SDK 1.4 Edition Exerci」· Java 代码 · 共 24 行

//Chapter 2, Exercise 3 

public class TaxCalc {
  public static void main(String args[]) {
    double income = 87562.34;   
    double taxRate = 0.35;   // 35%  corresponds to 0.35
    double tax = income*taxRate;             
    
    int taxDollars = (int)tax;
    int taxCents = (int)Math.round((tax - taxDollars)*Math.pow(10.0, 2.0)); 

    // Output the results:
    System.out.println("Gross income is $" + (int)income +"."+ (int)Math.round((income - (int)income)*Math.pow(10.0, 2.0)));
    System.out.println("Tax to pay is " + taxDollars + " dollars and "+taxCents+" cents.");

 /*
    The output statements above show how you can put arithmetic expressions as part of the argument
    to the println() method. The compiler takes care of coverting the values that result from the
    arithmetic expressions to a string.
 */
  }
}