testrationalclass.java

此源码为机械工业出版社出版的《Java语言程序设计》第三版所配套的书中所有源代码。

// TestRationalClass.java: Demonstrate using the Rational class
public class TestRationalClass
{
  // Main method
  public static void main(String[] args)
  {
    // Create and initialize two rational numbers r1 and r2.
    Rational r1 = new Rational(4, 2);
    Rational r2 = new Rational(2, 3);

    // Display results
    System.out.println(r1.toString() + " + " + r2.toString() +
      " = " + (r1.add(r2)).toString());
    System.out.println(r1.toString() + " - " + r2.toString() +
      " = " + (r1.subtract(r2)).toString());
    System.out.println(r1.toString() + " * " + r2.toString() +
      " = " + (r1.multiply(r2)).toString());
    System.out.println(r1.toString() + " / " + r2.toString() +
      " = " + (r1.divide(r2)).toString());
  }
}