import java.util.*;
/** Contains methods for creating music according to Mozart's
Musikalisches WŸrfelspiel --Mozart's musical dice game.
Within this class, a parameter d of type double[] is supposed
to be the values in a .wav array, as created by a call on
StdAudio.read.
*/
public class WurfelSpiel {
private final static int measure= 16; // The number of measures in a minuet or trio
private final static int die= 6; // Maximum value of a roll of a die
private static Random generator= new Random();
private final static int[][] minuet= {
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
{0, 96, 22, 141, 41, 105, 122, 11, 30, 70, 121, 26, 9, 112, 49, 109, 14},
{0, 32, 6, 128, 63, 146, 46, 134, 81, 117, 39, 126, 56, 174, 18, 116, 83},
{0, 69, 95, 158, 13, 153, 55, 110, 24, 66, 139, 15, 132, 73, 58, 145, 79},
{0, 40, 17, 113, 85, 161, 2 ,159, 100, 90, 176, 7, 4, 67, 160, 52, 170},
{0, 148, 74, 163, 45, 80, 97, 36, 107, 25, 143, 64, 125, 76, 136, 1, 93},
{0, 104, 157, 27, 167, 154, 68, 118, 91, 138, 71, 150, 29, 101, 162, 23, 151},
{0, 152, 60, 171, 53, 99, 133, 21, 127, 16, 155, 57, 175, 43, 168, 89, 172},
{0, 119, 84, 114, 50, 140, 86, 169, 94, 120, 88, 48, 166, 51, 115, 72, 111},
{0, 98, 142, 42, 156, 75, 129, 62, 123, 65, 77, 19, 82, 137, 38, 149, 8},
{0, 3, 87, 165, 61, 135, 47, 147, 33, 102, 4, 31, 164, 44, 59, 173, 78},
{0, 54, 130, 10, 103, 28, 37, 106, 5, 35, 20, 108, 92, 12, 124, 44, 131}
};
private final static int[][] trio= {
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
{0, 72, 6, 59, 25, 81, 41, 89, 13, 36, 5, 46, 79, 30, 95, 19, 66},
{0, 56, 82, 42, 74, 14, 7, 26, 71, 76, 20, 64, 84, 8, 35, 47, 88},
{0, 75, 39, 54, 1, 65, 43, 15, 80, 9, 34, 93, 48, 69, 58, 90, 21},
{0, 40, 73, 16, 68, 29, 55, 2, 61, 22, 67, 49, 77, 57, 87, 33, 10},
{0, 83, 3, 28, 53, 37, 17, 44, 70, 63, 85, 32, 96, 12, 23, 50, 91},
{0, 18, 45, 62, 38, 4, 27, 52, 94, 11, 92, 24, 86, 51, 60, 78, 31}
};
// The only constructor is private, so no instances can be created
// outside the class.
private WurfelSpiel() {}
/** = a roll of a die --an int in the range 1..6 */
public static int throwDie(){
return 0;
}
/** = String rep of sa: i.e. the string "[sa[0], sa[1], ..., ]". */
public static String toString(String[] sa) {
/** The kind of loop you write here is standard for producing
a list of things with comments between elements. You are
expected to study the result and to be able to produce
such code. */
String res= "[";
// invariant: res contains "[" followed by sa[0..i-1],
// with commas between elements.
for (int i= 0; i != sa.length; i= i+1) {
/** Process sa[i]. This is done in two steps.
(1) If this is not the first iteration, append ", " to res.
(2) Append s[i] to res.
*/
}
res= res + "]";
return res;
}
/** = A String array that contains the names of all the files
described by row 2 of array minuet and row 1 of array trio .
The file names are of the form
"measures/m.wav" and
"measures/T.wav",
so the files are expected to be in directory measures.
Here is an example of a file name: "measures/T5.wav".*/
public static String[] create1Spiel() {
// You must write one or more loops here. Do not write 32 assignments.
// The purpose is to prepare you to write the later function createRandomSpiel.
return null;
}
/** Play the music given by files whose names are in s, in order */
public static void play(String[] s) {
/** REMOVE THIS COMMENT WHEN DONE!!!
You can rely on methods StdAudio.read(String) and
StdAudio.play(double[]) when writing the body of this
procedure. */
}
/** Put all the measures given by file names in s into
a new array d and return d.
For example, suppose s contains three file names, and the
length of the three files are 50, 15, and 30. Then in the
returned array d,
the values in the first file go in d[0..49],
the values in the second file go in d[50..64],
the values in the third file go in d[65..94].
*/
public static double[] build(String[] s) {
int size= 0; // will contain the length of the result array
/* Store in size the length of the final array. Do this
by reading each file and adding its length to size
*/
// { size is the length of the result array }
/* Declare an array of the proper size, read in each file
and place its values in the array, and return the array
*/
return null;
}
/** = an array of random measure filenames:
16 for a minuet and then 16 for a trio.
The filenames have the form
"measures/m.wav" and
"measures/T.wav"
so the files are expected to be in directory measures,
which should be in the same folder as this class.
Here is an example of a file name: "measures/T5.wav".*/
public static String[] createRandomSpiel() {
return null;
}
/** Play d */
public static void play(double[] d){
StdAudio.play(d);
}
/** Place the values in array d into b[k], b[k+1], ... */
public static void copy(double[] d, double[] b, int k) {
for (int i= 0; i != d.length; i= i+1) {
b[k+i]= d[i];
}
}
}