/****************************************************************************** * Compilation: javac RandomSeq.java * Execution: java RandomSeq n lo hi * Dependencies: StdOut.java * * Prints N numbers between lo and hi. * * % java RandomSeq 5 100.0 200.0 * 123.43 * 153.13 * 144.38 * 155.18 * 104.02 * ******************************************************************************/ /** * The {@code RandomSeq} class is a client that prints out a pseudorandom * sequence of real numbers in a given range. *
* For additional documentation, see Section 1.1 of * Algorithms, 4th Edition by Robert Sedgewick and Kevin Wayne. * * @author Robert Sedgewick * @author Kevin Wayne */ public class RandomSeq { // this class should not be instantiated private RandomSeq() { } /** * Reads in two command-line arguments lo and hi and prints n uniformly * random real numbers in [lo, hi) to standard output. * * @param args the command-line arguments */ public static void main(String[] args) { // command-line arguments int n = Integer.parseInt(args[0]); // for backward compatibility with Intro to Programming in Java version of RandomSeq if (args.length == 1) { // generate and print n numbers between 0.0 and 1.0 for (int i = 0; i < n; i++) { double x = StdRandom.uniformDouble(0.0, 1.0); StdOut.println(x); } } else if (args.length == 3) { double lo = Double.parseDouble(args[1]); double hi = Double.parseDouble(args[2]); // generate and print n numbers between lo and hi for (int i = 0; i < n; i++) { double x = StdRandom.uniformDouble(lo, hi); StdOut.printf("%.2f\n", x); } } else { throw new IllegalArgumentException("Invalid number of arguments"); } } }