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71 lines
2.0 KiB
Java
71 lines
2.0 KiB
Java
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import edu.princeton.cs.introcs.StdOut;
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import edu.princeton.cs.introcs.StdRandom;
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/*************************************************************************
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* Compilation: javac RandomSeq.java
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* Execution: java RandomSeq N lo hi
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*
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* Prints N numbers between lo and hi.
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*
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* % java RandomSeq 5 100.0 200.0
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* 123.43
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* 153.13
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* 144.38
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* 155.18
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* 104.02
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*
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*************************************************************************/
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/**
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* The RandomSeq class is a client that prints out a pseudorandom
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* sequence of real numbers in a given range.
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*
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* For additional documentation, see <a href="http://algs4.cs.princeton.edu/11model">Section 1.1</a> of
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* Algorithms, 4th Edition by Robert Sedgewick and Kevin Wayne.
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*
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* @author Robert Sedgewick
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* @author Kevin Wayne
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*/
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public class RandomSeq {
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// this class should not be instantiated
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private RandomSeq() { }
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/**
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* Reads in two command-line arguments lo and hi and prints N uniformly
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* random real numbers in [lo, hi) to standard output.
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*/
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public static void main(String[] args) {
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// command-line arguments
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int N = Integer.parseInt(args[0]);
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// for backward compatibility with Intro to Programming in Java version of RandomSeq
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if (args.length == 1) {
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// generate and print N numbers between 0.0 and 1.0
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for (int i = 0; i < N; i++) {
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double x = StdRandom.uniform();
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StdOut.println(x);
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}
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}
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else if (args.length == 3) {
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double lo = Double.parseDouble(args[1]);
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double hi = Double.parseDouble(args[2]);
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// generate and print N numbers between lo and hi
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for (int i = 0; i < N; i++) {
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double x = StdRandom.uniform(lo, hi);
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StdOut.printf("%.2f\n", x);
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}
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}
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else {
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throw new IllegalArgumentException("Invalid number of arguments");
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}
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}
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}
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