package algs11;
import stdlib.*;
public class PlaygroundMax {
  public static double max (double[] a) {
    if (a.length == 0) { throw new IllegalArgumentException(); }
    double m = a[0];
    int i = 1;
    while (i < a.length) {
      if (m < a[i]) { m = a[i]; }
      i += 1;
    }
    return m;
  }
  public static void testMax (double expected, double[] a) {
    double actual = max (a);
    if (expected != actual) {
      StdOut.format ("max failed: Expecting [%d] Actual [%d] with argument %s\n", expected, actual, java.util.Arrays.toString(a));
    }
  }
  public static void main (String[] args) { 
    testMax(31, new double[] { 11, 21, 31 });
    testMax(31, new double[] { 11, 31, 21 });
    testMax(31, new double[] { 31, 11, 21 });
    testMax(21, new double[] { 21, 11 });
    testMax(21, new double[] { 11, 21 });
    testMax(11, new double[] { 11 });
    try {
      max (new double[] { });
      StdOut.println ("max failed: Expecting [IllegalArgumentException] with argument [ ]");
    } catch (IllegalArgumentException e) { }
    StdOut.println ("Finished tests");
  }
}