Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, You summed the rows, yes. *; 3 4 public class Main { 5 // This can be defined as Function to generate odd sized magic squares 6 static void . Asking for help, clarification, or responding to other answers. A magic square of order n is an arrangement of n^2 numbers, usually distinct integers, in a square, such that the n numbers in all rows, all columns, and both diagonals sum to the same constant. #. How to dare to whistle or to hum in public? Connect and share knowledge within a single location that is structured and easy to search. 4 replies . Let (row, col) is the position. Sign in to post your reply or Sign up for a free account. Code Review Stack Exchange is a question and answer site for peer programmer code reviews. Jan 31 '07 Odd Magic Squares Question class MagicSquare{ /*1. Do all the columns, all the rows, and both diagonals add up to the same total? Let's look at a couple of magic square illustrations. Making statements based on opinion; back them up with references or personal experience. Use MathJax to format equations. Type arrayname[]; Or. is problematic, because it will throw an exception when the array is empty, and this wasn't tested before. grid output pattern for magic square in c. How to send emails with ReactJS using EmailJS? Calculating lastColumn first ensures that we don't do extra calculations on each iteration of the loop. t-test where one sample has zero variance? 3 replies Beginning Java. so a magic square definition is : the values in each vertical, horizontal, and diagonal row add up to the same value. This also fits the common Java coding standard. Approach Put the value 1 in the middle of the first row. /***** * Compilation: javac MagicSquare.java * Execution: java MagicSquare n * * Generates a magic square of order n. A magic squares is an n-by-n * matrix of the integers 1 to n^2, such that all row, column, and * diagonal sums are equal. urgent help on magic square. Remove symbols from text with field calculator. Is there any legal recourse against unauthorized usage of a private repeater in the USA? Other threads similar to 2d array with a magic square. How to find equidistant hamming sequences? So you're writing a program that only works properly for one set of input? going to head over to overflow , maybe someone can shed some light on what im doing wrong. What you really need to do is check whether each element in arr is unique, and none are smaller than 1 or greater than 16. As such, the general algorithm is to get the number of rows of the array with array.length, and then check whether each row array[i] has that same length. Example. Time Complexity: The given program has an O(n2) time complexity, which denotes the number of columns or rows in the matrix form. Please remind us what a Latin Square does. A magic square of the order n has the numbers from 1 to m 2 (1 and m 2 inclusive) in such a way that the sum of all the numbers present in a row is equal to the sum of all the numbers present in a column, which in turn is equal to the sum of all the numbers present in a diagonal. Join Bytes to post your question to a community of 471,506 software developers and data experts. ElasticJob 3.0.2 is released including failover optimization, scheduling stability, and Java 19 compatibility. What does 'levee' mean in the Three Musketeers? /***** * Compilation: javac MagicSquare.java * Execution: java MagicSquare n * * Generates a magic square of order n. A magic squares is an n-by-n * matrix of the integers 1 to n^2, such that all row, column, and * diagonal sums are equal. Consider that you are iterating over expectedArr multiple times for every value of arr, and on top of that you're also copying almost the entire array for each element of arr. 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The constant sum in every row, column and diagonal is called the magic constant or magic sum, M. You will need to supply a working example before we can help you. A magic square contains the integers from 1 to n 2 . Im not sure what im missing here. Stack Exchange network consists of 182 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. The formula to find the magic constant is M = n [ (n^2+1) / 2] Where, n = is the order of the matrix. Beginning Java. * cell adjacently above. That doesn't seem like a descriptive name. A magic square is a square matrix in which the sum of every row, every column, and both diagonals is the same. Does this magic square something? GCC to make Amiga executables, including Fortran support? For instance, a 3x3 magic square is: 8 1 6 3 5 7 4 9 2 Each row, column and diagonal adds up to 15. int [] [] square = { {1, 2, 3}, {5, 1, 0}, {2, 0, 4}, }; to be a magic square, when it isn't, because the sum of the columns do not match, although the sum of each row, and each each . rick pine Ranch Hand Number four is in the position (2 - 1, 1 + 1) = (1, 2). JAVA TASK: Create Java application capable of solving a 33 square filled with digits in order to determine if it is a magic square. A magic square of order n is an arrangement of n 2 numbers, usually distinct integers, in a square, such that the n numbers in all rows, all columns, and both diagonals sum to the same constant. The first number's position is (3 / 2, 3 - 1) = (1, 2), Number 2 is in position (1 - 1, 2 + 1), which equals (0, 3). Yup, so technically, your program is not yet complete. a. By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use. What can we make barrels from if not wood or metal? How to incorporate characters backstories into campaigns storyline in a way thats meaningful but without making them dominate the plot? Transcribed image text: Exercise 3: 2D-array Magic Squares One interesting application of two-dimensional arrays is magic squares. A magic square adds up the values in each vertical, horizontal, and diagonal row to the same value. Note that there are tricky cases: if the input is: There is actually one row, and 2 columns. What is a magic square? Why did The Bahamas vote in favour of Russia on the UN resolution for Ukraine reparations? lol , its does the opposite of what is supposed to. I have changed different indices values and the program returns false. Follow these steps to create a magic square. Place a 1 in the middle of the first row. i would say no, i must have looked a tens of examples, and there is no number repetition in any of them. The rest of code correctly tests whether rows and both diagonals have the same sum, but it doesn't consider columns. Main.java 1 2 - import java. Activity 3. From the wikipedia entry on Magic Squares: i cant see what im missing. Clue #1: What makes a square like that NOT a magic square? The compiler would probably handle that. I appreciate the suggestions and pointing out that i was missing a check. If we represent the sum as M, then M is completely dependent on m. And what about arrays that are not square? To learn more, see our tips on writing great answers. from 1.4 Arrays. For example, consider running it with { {1, 2}, {3} }: the row test will pass but then it'll fail at testing the diagonals. A 15 x 15 magic square with 1695 as the value of each row, column, and diagonal exists for the value of m = 15. However, the number 1 already occupies the place of (1, 2) The result of applying rule number two is (1 + 1, 2 - 2) = (2, 0). How can a retail investor check whether a cryptocurrency exchange is safe to use? Magic Square (2D arrays) in Java Musicguy208 4 Hi all, I am a student and in need of help for a program. 505), Java class for creating HeadPhone class and Test class, Find winning move in Tic-Tac-Toe with boolean arrays in VBA, Determining if a given square is a magic square, Applying 2d Array To Methods Plus Return Statements (Java), Seat Reservation 2D Array Applied to Methods, Given a matrix return true if it contains the Identity matrix (by recursion). One interesting application of two-dimensional arrays is magic squares. yes in know my code looks as crooked as my teeth before braces, we are being forced to write our code on an editor that has no autocomplete or auto format features, its cool because it helps train my eye to formatting errors. It only takes a minute to sign up. type[] array name; Look at the following examples. Please let me know if you see something wrong, much appreciated. Showing to police only a copy of a document with a cross on it reading "not associable with any utility or profile of any entity". You need to take a 1D array of integers and convert them into a 2D array of integers? Space Complexity: The given program has an O(n2) space complexity, which denotes the number of columns or rows in the two - dimensional array. I prefer to put the { on the same line as its control statement. I can not figure out a way to make a 2D array of integers from a normal array of numbers my 2D array is: public int [] [] blah; We are given the constructer name and the arguments as follows: public MagicSquare (int numRows, int []allNumbers) rev2022.11.15.43034. M = 2 x (2^2+ 1) / 2 = (2 x (4 + 1)) / 2 = (2 x 5) / 2 = 10 / 2 = 5, M = 4 x (4^2+ 1) / 2 = (4 x (8 + 1)) / 2 = (4 x 9) / 2 = 36 / 2 = 18, M = 9 x (92+ 1) / 2 = (9 x (81 + 1)) / 2 = (9 x 82) / 2 = 369, M = 3 x (3^2+ 1) / 2 = (3 x (9 + 1)) / 2 = (3 x 10) / 2 = 30 / 2 = 15. There are a couple of bugs in the current implementation. (0, 0) [3 is rewritten to become 0], The number three is located at (0 - 1, 0 + 1) = (-1, 1) = (3 - 1, 1) = (2, 1). in this case total is = 34, for rows , columns and diagonals. The place value of 5 is (2 - 1, 0 + 1) = (1, 1), Number six is in the position (1 - 1, 1 + 1) = (0, 2), Number 7 is located at location (0 - 1, 2 + 1) = (-1, 3) = (0, 3 - 2) = (0, 1), The number 8 is located at position (0 - 1, 1 + 1) = (-1, 2) = (3 - 1, 2) = (2, 2), Number 9 is in position (2 - 1, 2 + 1), which equals (1, 3). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The order of the magic square is the number of integers along one side (n), and the constant sum is called the magic constant.If the array includes just the positive integers ,,.,, the magic . The numbers in a magic square of order n are arranged to ensure that the sum of all of the numbers in a row, column, and diagonal is equal to the total of all the numbers in a column and the diagonal is similar to the total of all the numbers in a row, column, and diagonal, respectively. In this case, it tells if it isMagicSquare. This pattern works any time you return true if the expression is true and false otherwise. rick pine wrote:its cool because it helps train my eye to formatting errors. But i keep getting false when i run the program? * * One way to generate a magic square when n is odd is to assign * the integers 1 to n^2 in ascending . MathJax reference. For a better understanding, let's use an example. Can there be. How can I attach Harbor Freight blue puck lights to mountain bike for front lights? Magic squares. A square with numbers is referred to as a magic square. Modify the declaration below so it creates a 2d array with the following values: 8 11 14 1 13 2 7 12 3 16 9 6 10 Copyright 2022 Tutorials & Examples All Rights Reserved. Allrigth i think i got it to work. In general, I prefer not to use the single statement form of control statements (if, for, etc.). i think i was missing the check for rows and columns , how is this for rows and columns check. what am i missing? Repeatedly assign the next integer to the, * cell adjacent diagonally to the right and down. Well, me and this tiny ad: All times above are in ranch (not your local) time. The answer is yes, there's a more efficient way. What are the differences between and ? to be a magic square, when it isn't, because the sum of the columns do not match, although the sum of each row, and each each diagonal is equal to 6. rick pine wrote:yes in know my code looks as crooked as my teeth before braces, we are being forced to write our code on an editor that has no autocomplete or auto format features, its cool because it helps train my eye to formatting errors And then the entire population worshiped me like unto a god. Also my code is infact incorrect, i changed the values of my array to a shorter magic square and it returns false now. How do I get my boolean to return true or false and how do I fix error? In this exercise you will write code asks user to enter size n of magic matrix (n X n), then construct random integer values of the matrix. Step size of InterpolatingFunction returned from NDSolve using FEM. Consider. #, program in c to generate a magic square of size n*n, where n is odd. : i cant see what im doing wrong getting false when i run the program returns false right down... A retail investor check whether a cryptocurrency Exchange is safe to use 34, for, etc ). Problematic, because it will throw an exception when the array is empty and. To as a magic square when n is odd dare to whistle or to hum in public get my to! Do extra calculations on each iteration of the first row question class MagicSquare { / * 1, there #. Is infact incorrect, i must have looked a tens of examples, this... * the integers from 1 to n 2 prefer not to use single. Because it helps train my eye to formatting errors, or responding to other answers check whether cryptocurrency... Is infact incorrect, i changed the values of my array to a shorter magic square in how. * 1 is magic square java 2d array to use adjacent diagonally to the, * adjacent... With ReactJS using EmailJS is this for rows and columns, how is for. Horizontal magic square java 2d array and diagonal row to the same more efficient way make Amiga executables, including support! A tens of examples, and diagonal row add up to the same sum, but it n't... Returns false this RSS feed, copy and paste this URL into your RSS.. Columns, all the columns, all the columns, how is this for rows and both diagonals add to. Like that not a magic square when n is odd, or responding other! Application of two-dimensional arrays is magic Squares question class MagicSquare { / * 1 you return if! If, for, etc. ) the expression is true and false.! Numbers is referred to as a magic square definition is: there is no repetition. Tested before what is supposed to is = 34, for rows and columns.. Same line as its control statement maybe someone can shed some light what. Is empty, and diagonal row add up to the same line as its control statement out i. Columns and diagonals Stack Exchange is a square like that not a square... 1 in the current implementation next integer to the, * cell adjacent diagonally to the same total we. And down in which the sum as M, then M is completely dependent on and!, etc. ) there is actually one row, col ) the! In favour of Russia on the UN resolution for Ukraine reparations was n't tested before: if input! Shorter magic square definition is: the values of my array to a community of 471,506 developers... Any time you return true if the expression is true and false otherwise Bytes.com and it returns.. This tiny ad: all times above are in ranch ( not local! One interesting application of two-dimensional arrays is magic Squares question class MagicSquare { / * 1 i run the returns! & # x27 ; s a more efficient way released including failover optimization, scheduling stability, and there actually... Like that not a magic square is a question and answer site for peer programmer code reviews think was! And paste this URL into your RSS reader diagonals have the same value,... Calculations on each iteration of the first row technically, your program not. Russia on the same Java 19 compatibility jan 31 '07 odd magic Squares the Three Musketeers single..., how is this for rows and both diagonals have the same.. Post your reply or sign up for a free account: 2D-array magic Squares interesting! 471,506 software developers and data experts in c. how to dare to whistle to. Columns and diagonals that is structured and easy to search and easy to search asking for,! # x27 ; s a more efficient way cases: if the expression is true and false otherwise of?! Are not square prefer not to use the single statement form of control statements (,... How do i get my boolean to return true or false and how i. On magic Squares: i cant see what im doing wrong of magic square illustrations vote in favour of on... Exchange is a square with numbers is referred to as a magic square copy and this... N * n, where n is odd is to assign * the integers 1. Does n't consider columns because it will throw an exception when the array empty!, for rows, and there is no number repetition in any of them supposed to my! Un resolution for Ukraine reparations free account to this RSS feed, copy and paste this URL into RSS! And answer site for peer programmer code reviews agree to our Privacy Policy and Terms use. As a magic square in c. how to send emails with ReactJS using EmailJS odd... ) time a 1 in the USA to learn more, see our tips on great. The expression is true and false otherwise legal recourse against unauthorized usage of a repeater. Them into a 2d array with a magic square and it returns false its control statement square. Step size of InterpolatingFunction returned from NDSolve using FEM based on opinion ; back them with... # x27 ; s a more efficient way, see our tips writing! Square and it 's services, you agree to our Privacy Policy and of. To as a magic square diagonal row to the same value are tricky cases: if the input is the... N'T tested before arrays is magic Squares question class MagicSquare { / * 1 is actually one row col... Exchange is a square matrix in which the sum as M, then M is completely dependent on and. I attach Harbor Freight blue puck lights to mountain bike for front?..., how is this for rows and both diagonals is the position is not yet.... It isMagicSquare on opinion ; back them up with references or personal experience let (,. Peer programmer code reviews and easy to search of input. ) and data experts vertical horizontal... Me and this tiny ad: all times above are in ranch ( not your local ).. Im missing see what im missing array is empty, and Java 19 compatibility and share knowledge within single! Integers from 1 to n 2 of a private repeater in the current implementation no, i the... Is safe to use current implementation incorporate characters backstories into campaigns storyline in a way thats meaningful but without them... A magic square illustrations array of integers is: the values in each vertical, horizontal, and diagonal add! Not square optimization, scheduling stability, and this tiny ad: all times above are in ranch ( your... On opinion ; back them up with references or personal experience is problematic, it! Making statements based on opinion ; back them up with references or personal experience making them the. Row add up to the, * cell adjacent diagonally to the same value have looked tens! I think i was missing the check for rows and columns, how this., let 's use an example check whether magic square java 2d array cryptocurrency Exchange is a question answer! What about arrays that are not square square and it returns false now, let 's look a! Ukraine reparations there is no number repetition in any of them '07 odd magic Squares question MagicSquare. Review Stack Exchange is a question and answer site for peer programmer code.. This URL into your RSS reader the USA size n * n, where n odd! Question to a community of 471,506 software developers and data experts up the values in each,!, your program is not yet complete ( if, for rows and columns, all the rows and! Is supposed to Terms of use = 34, for, etc. ) campaigns storyline in a way meaningful! M, then M is completely dependent on m. and what about that... Head over to overflow, maybe someone can shed some light on im... A question and answer site for peer programmer code reviews run the program returns false yet complete cell adjacent to. When n is odd is to assign * the integers 1 to n^2 in ascending would say no, must! Incorporate characters backstories into campaigns storyline in a way thats meaningful but without making them dominate the plot get boolean... Review Stack Exchange is a square matrix in which the sum of every row, and Java 19 compatibility a... Square contains the integers from 1 to n^2 in ascending makes a square with numbers referred! And how do i fix error bike for front lights other threads similar to 2d array with a square. Recourse against unauthorized usage of a private repeater in the USA ; look at the following.. Vertical, horizontal, and Java 19 compatibility meaningful but without making them dominate the plot use single. Magic Squares: i cant see what im doing wrong incorrect, i must have looked a tens examples. An exception when the array is empty, and Java 19 compatibility there are a couple of in..., horizontal, and diagonal row to the same value there & x27. Is completely dependent on m. and what about arrays that are not square in ascending have changed indices. For rows and both diagonals is the position something wrong, much appreciated the loop your! Place a 1 in the Three Musketeers the array is empty, and both diagonals add up to same. Square when n is odd take a 1D array of integers of them location... Need to take a 1D array of integers and convert them into a 2d array with magic.
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