ITI0011:harjutus 04 mall
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Uuendatud mall EX04 jaoks (vana mall töötab ka, aga muutujate nimed ei vasta tegelikule sisule).
Täpsustus.
Kasutaja peab sisestama tekstis mainitud (x, y) punktide asemel ruudu asukoha kujul rea_indeks,veeru_indeks. Rea indeksi loendamine hakkab ülevalt, veeru indeksi loendamine hakkab vasakult. Näiteks 0,3 on 'x'-ga märgitud:
...x .... .... ....
<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>