DoubleOps.java

/******************************************************************************
 *  Compilation:  javac DoubleOps.java
 *  Execution:    java DoubleOps a b
 *
 *  Illustrates the integer operations a + b, a * b, and a / b.
 *
 *  % java DoubleOps 1234 99
 *  1234.0 + 99.0 = 1333.0
 *  1234.0 * 99.0 = 122166.0
 *  1234.0 / 99.0 = 12.464646464646465
 *  1234.0 % 99.0 = 46.0
 *
 *  % java DoubleOps 10 -3
 *  10.0 + -3.0 = 7.0
 *  10.0 * -3.0 = -30.0
 *  10.0 / -3.0 = -3.3333333333333335
 *  10.0 % -3.0 = 1.0
 *
 *  % java DoubleOps Infinity 3
 *  Infinity + 3.0 = Infinity
 *  Infinity * 3.0 = Infinity
 *  Infinity / 3.0 = Infinity
 *  Infinity % 3.0 = NaN
 *
 ******************************************************************************/

public class DoubleOps { 

    public static void main(String[] args) {
        double a = Double.parseDouble(args[0]);
        double b = Double.parseDouble(args[1]);
        double sum  = a + b;
        double prod = a * b;
        double quot = a / b;
        double rem  = a % b;

        System.out.println(a + " + " + b + " = " + sum);
        System.out.println(a + " * " + b + " = " + prod);
        System.out.println(a + " / " + b + " = " + quot);
        System.out.println(a + " % " + b + " = " + rem);

        System.out.println();
        System.out.println("sin(pi/2) = " + Math.sin(Math.PI/2));
        System.out.println("log(e)    = " + Math.log(Math.E));
    }
}