ITI0011:harjutus 04 mall

Uuendatud mall EX04 jaoks (vana mall töötab ka, aga muutujate nimed ei vasta tegelikule sisule):

<source lang="java"> import java.util.Scanner;

/**

* EX04.
*/

public class EX04 {

   /** Guess parameter array index for guess ROW value*/
   public static final int FIELD_ROW = 0;
   /** Guess parameter array index for guess COL value*/
   public static final int FIELD_COL = 1;
   /** Settings parameter array index for matrix height value*/
   public static final int FIELD_MATRIX_HEIGHT = 0;
   /** Settings parameter array index for matrix width value */
   public static final int FIELD_MATRIX_WIDTH = 1;
   /** Settings parameter array index for matrix target row value */
   public static final int FIELD_TARGET_ROW = 2;
   /** Settings parameter array index for matrix target col value*/
   public static final int FIELD_TARGET_COL = 3;
   /** The count of settings parameters */
   public static final int INITIAL_PARAMETER_ARRAY_LENGTH = 4;
   /** The count of guess parameters */
   public static final int GUESS_ARRAY_LENGTH = 2;
   /** Maximum matrix dimension value */
   public static final int MAX_DIMENSION = 10;
   /** Precision for double checking */
   public static final double ERROR_BOUND = 0.001;

   /**
    * Entry point.
    * @param args commandline arguments
    */
   public static void main(String[] args) {
       Scanner scanner = new Scanner(System.in);
       int[] matrixParameters = readInitialMatrixParameters(scanner);
       char[][] matrix = createMatrix(
               matrixParameters[FIELD_MATRIX_HEIGHT],
               matrixParameters[FIELD_MATRIX_WIDTH],
               matrixParameters[FIELD_TARGET_ROW],
               matrixParameters[FIELD_TARGET_COL]
       );

       int[] guessInput;
       int totalGuesses = 0;
       while (true) {
           System.out.println(getAsciiMatrix(matrix));
           guessInput = readGuessInput(scanner, matrixParameters);
           totalGuesses++;
           System.out.println("Katseid : " + totalGuesses);
           double distance = guess(matrix, guessInput[FIELD_ROW], guessInput[FIELD_COL]);
           if (distance < ERROR_BOUND) {
               System.out.println("Lahendus leitud " + totalGuesses + " katsega!");
               break;
           } else {
               System.out.printf("Kaugus mõeldud punktist %.2f\n", distance);
           }
       }
   }

   public static char[][] createMatrix(int n, int m, int row, int col) {
       // TODO: implement this function
       return null;
   }

   public static double guess(char[][] matrix, int row, int col) {
       // TODO: implement this function
       return 0.0;
   }

   public static String getAsciiMatrix(char[][] matrix) {
       // TODO: implement this function
       return "";
   }

   /**
    * Read user guess input from scanner.
    * Returned array structure:
    * row index, column index
    * Index 0 - row, Index 1 - col
    *
    * @param scanner          Input scanner
    * @param matrixParameters Array of user guess information
    * @return int[] array of guess input parameters
    */
   public static int[] readGuessInput(Scanner scanner, int[] matrixParameters) {
       int[] parameters;
       do {
           System.out.print("Sisestage mõeldav ruut (näiteks 0,0):");
           String parameterInput = scanner.nextLine();
           parameters = splitInputStructureToIntArray(parameterInput);
       } while (!validateGuessInput(parameters, matrixParameters));
       return parameters;
   }

   /**
    * Validate whether the guess input parameters are ok.
    * 1) guess input length must be 2 (row and col indices)
    * 2) row and col must be inside matrix that is specified by the matirxParameters
    *
    * @param guessInput       user guess input, consists of [0] - row [1] - col indices
    * @param matrixParameters game matrix parameters (look readInitialMatrixParameters for structure information)
    * @return whether the guess input is ok.
    */
   public static boolean validateGuessInput(int[] guessInput, int[] matrixParameters) {
       if (guessInput.length != GUESS_ARRAY_LENGTH) {
           return false;
       }
       for (int guessValue : guessInput) {
           if (guessValue < 0) {
               return false;
           }
       }
       return guessInput[FIELD_ROW] < matrixParameters[FIELD_MATRIX_HEIGHT]
               && guessInput[FIELD_COL] < matrixParameters[FIELD_MATRIX_WIDTH];
   }

   /**
    * Read matrix parameters from scanner.
    * returned array structure
    * N - Matrix height, M - matrix width
    * ROW - row index of target square,
    * COL - column index of target square
    * index 0 - N value, index 1 - M value
    * index 2 - ROW value, index 3 - COL value
    *
    * @param scanner Input scanner
    * @return int[] - Array of user input parameters
    */
   public static int[] readInitialMatrixParameters(Scanner scanner) {
       int[] parameters;
       do {
           System.out.print("Sisestage N,M,ROW,COL (näiteks: 2,2,0,0):");
           String parameterInput = scanner.nextLine();
           parameters = splitInputStructureToIntArray(parameterInput);
       } while (!validateInitialParameters(parameters));

       return parameters;
   }

   /**
    * Converts input that is separated by commas to integer array.
    * If value is not convertable to int -1 is used.
    *
    * @param input input string to be parsed
    * @return int[] array of int values.
    */
   public static int[] splitInputStructureToIntArray(String input) {

       String[] splitParts = input.replaceAll(" ", "").split(",");
       int[] parameters = new int[splitParts.length];
       for (int i = 0; i < splitParts.length; i++) {
           try {
               parameters[i] = Integer.parseInt(splitParts[i]);
           } catch (NumberFormatException e) {
               parameters[i] = -1;
           }
       }
       return parameters;
   }

   /**
    * Check whether the input input parameters are ok.
    * We consider a parameter ok when its value is between 1 and 10(exclusive) and
    * ROW, COL are inside the matrix
    *
    * @param parameters Array of user matrix parameters.
    * @return boolean - whether the input parameters are ok.
    */
   public static boolean validateInitialParameters(int[] parameters) {
       if (parameters.length != INITIAL_PARAMETER_ARRAY_LENGTH) {
           return false;
       }
       for (int parameter : parameters) {
           if (parameter < 0 || parameter > MAX_DIMENSION) {
               return false;
           }
       }
       return parameters[FIELD_MATRIX_HEIGHT] > parameters[FIELD_TARGET_ROW]
               && parameters[FIELD_MATRIX_WIDTH] > parameters[FIELD_TARGET_COL];
   }

} </source>