У меня ошибка при попытке запустить мою программу.Я все еще задаюсь вопросом, почему он не прочитал бы другой размер квадрата в magicData.txt, и я получаю ошибку ArrayIndexOutOfBoundsException, является ли эта ошибка из-за того, что логический магический класс не возвращает, является ли это истиной или нет.
run:
******** Square 1 ********
8 1 6 3 5 7 4 9 2 the sum of row 0 is...: 15
the sum of row 1 is...: 15
the sum of row 2 is...: 15
the sum of columns 0 is....: 15
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 3
The sum of the main diagonal is......: 15
The sum of the other diagonal is.....: 15
Is it a magic square: true
the sum of columns 1 is....: 15
The sum of the main diagonal is......: 15
The sum of the other diagonal is.....: 15
Is it a magic square: true
the sum of columns 2 is....: 15
The sum of the main diagonal is......: 15
The sum of the other diagonal is.....: 15
Is it a magic square: true
at assignment6.Square.sumCol(Square.java:42)
at assignment6.SquareTest.main(SquareTest.java:36)
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)
SquareTest.java
import java.util.Scanner;
import java.io.*;
public class SquareTest {
public static void main(String[] args) throws IOException
{
Scanner scan = new Scanner(new File("magicData.txt"));
int count = 1; //count which square we're on
int size = scan.nextInt(); //size of next square
//Expecting -1 at bottom of input file
while (size != -1)
{
//create a new Square of the given size
Square Size = new Square(size);
//call its read method to read the values of the square
Size.readSquare(scan);
System.out.println("\n******** Square " + count + " ********");
//print the square
Size.printSquare();
//print the sums of its rows
for (int row = 0; row < size; row++) {
System.out.println("the sum of row " + row + " is...: " + Size.sumRow(row));}
//print the sums of its columns
for (int col = 0; col < size; col++) {
System.out.println("the sum of columns " + col + " is....: "+ Size.sumCol(col));
//print the sum of the main diagonal
System.out.println("The sum of the main diagonal is......: "+ Size.sumMainDiag());
//print the sum of the other diagonal
System.out.println("The sum of the other diagonal is.....: "+ Size.sumOtherDiag());
//determine and print whether it is a magic square
System.out.println("Is it a magic square: " + Size.magic());
//get size of next square
size = scan.nextInt();
count++;
}
}
}
}
Square.java
import java.util.Scanner;
public class Square {
int[][] square;
//--------------------------------------
//create new square of given size
//--------------------------------------
public Square(int size)
{
square = new int [size][size];
}
//--------------------------------------
//return the sum of the values in the given row
//--------------------------------------
public int sumRow(int row)
{
int sum = 0;
for(int i=0; i < square.length; i++){
sum+=square[row][i];
}
return sum;
}
//--------------------------------------
//return the sum of the values in the given column
//--------------------------------------
public int sumCol(int col)
{int sum = 0;
for (int i = 0; i < square.length; i++){
sum = sum + square[i][col]; }
return sum;
}
//--------------------------------------
//return the sum of the values in the main diagonal
//--------------------------------------
public int sumMainDiag()
{int sum = 0;
for (int i = 0; i < square.length; i++) {
sum = sum + square[i][i];
}
return sum;
}
//--------------------------------------
//return the sum of the values in the other ("reverse") diagonal
//--------------------------------------
public int sumOtherDiag()
{int sum = 0;
for (int i = 0; i < square.length; i++) {
sum = sum + square[i][square.length - 1 - i];
}
return sum;
}
//--------------------------------------
//return true if the square is magic (all rows, cols, and diags have
//same sum), false otherwise
//--------------------------------------
public boolean magic()
{boolean magic = true;
int sum = sumMainDiag();
if (sumOtherDiag() != sum) {
magic = false;}
else {
for (int row = 0; row < square.length; row++) {
if (sum != sumRow(row)) {
magic = false;}
for (int col = 0; col < square.length; col++) {
if (sum != sumCol(col)) {
magic = false;}
}
}
}
return magic;
}
//--------------------------------------
//read info into the square from the input stream associated with the
//Scanner parameter
//--------------------------------------
public void readSquare(Scanner scan)
{
for (int row = 0; row < square.length; row++)
for (int col = 0; col < square.length; col ++)
square[row][col] = scan.nextInt();
}
//--------------------------------------
//print the contents of the square, neatly formatted
//--------------------------------------
public void printSquare()
{
for (int row = 0; row < square.length; row++)
for (int col = 0; col < square.length; col++) {
System.out.print(square[row][col] + " ");
}
}
}
magicData.txt
3
8 1 6
3 5 7
4 9 2
7
30 39 48 1 10 19 28
38 47 7 9 18 27 29
46 6 8 17 26 35 37
5 14 16 25 34 36 45
13 15 24 33 42 44 4
21 23 32 41 43 3 12
22 31 40 49 2 11 20
4
48 9 6 39
27 18 21 36
15 30 33 24
12 45 42 3
3
6 2 7
1 5 3
2 9 4
4
3 16 2 13
6 9 7 12
10 5 11 8
15 4 14 1
5
17 24 15 8 1
23 5 16 14 7
4 6 22 13 20
10 12 3 21 19
11 18 9 2 25
7
30 39 48 1 10 28 19
38 47 7 9 18 29 27
46 6 8 17 26 37 35
5 14 16 25 34 45 36
13 15 24 33 42 4 44
21 23 32 41 43 12 3
22 31 40 49 2 20 11
-1