java - passing 2 dimensional array and return 1 dimensional array -
public class magicsquare { public static void main(string[] args) { int[][] mysquare = {{2,7,6}, {9,5,1}, {4,3,8}}; system.out.print(columnsareallequaltomagicsum(mysquare)); } //***********************// public static int getsumofcolumn(int[] /*[] array, int index*/) { int sum = 0; //********// int[] t = getcolumn(array /*, index*/); (int = 0; < t.length; i++) { sum = sum + t[i]; system.out.print(t[i] + " "); } system.out.println(); return sum; } public static int[] getcolumn(int[][] array, int index) { int[] result = new int[array[1].length]; (int = 0; < array[1].length; i++) { result[i] = array[i][index]; } return result; } public static boolean columnsareallequaltomagicsum(int[][] array) { int arraylength = array[1].length; int previousvalue = 0; (int = 0; < arraylength; i++) { int value = getsumofcolumn(array, i); if (i != 0) { if (previousvalue != value) { return false; } } previousvalue = value; } return true; } this code works fine if uncomment comments. i'm trying here pass in 2d array getcolumn method , returning in 1d array gets passed getsumofcolumn. columnsareallequaltomagicsum check see if columns equal 15 , return true, else false. , how that?
well, see lot of errors in code:
delete comments. not code inside of them,
/* */.if you, won't create variable set length of first column in multidimensional array. put in loop:
for (int = 0; < array[1].length; i++){}
if pass 2 variables method
getsumofcolumn, have 1 parameter in declaration of method, won't work. have declareindex. also, if pass there variable has multidimensional array can't declare simple array.if try set previousvalue in
ifstatement, have includepreviousvalue = valueinif-elsestatement because, if not, setpreviousvaluevalue.you never compare if number it's 15.
in opinion, code have this:
public class magicsquare { public static void main(string[] args) { int[][] mysquare = {{2,7,6}, {9,5,1}, {4,3,8}}; system.out.print(columnsareallequaltomagicsum(mysquare)); } public static int getsumofcolumn(int[][] array, int index) { int sum = 0; int[] t = getcolumn(array, index); (int = 0; < t.length; i++) { sum = sum + t[i]; system.out.print(t[i] + " "); } system.out.println(); return sum; } public static int[] getcolumn(int[][] array, int index) { int[] result = new int[array[1].length]; (int = 0; < array[0].length; i++) { result[i] = array[i][index]; } return result; } public static boolean columnsareallequaltomagicsum(int[][] array) { int previousvalue = 15; boolean correct = true; (int = 0; < array[1].length && correct == true; i++) { int value = getsumofcolumn(array, i); if (i != 0) { if (previousvalue != value) { correct = false; } } } if(correct == true){ return true; } else{ return false; } } if didn't missunderstood question, think want sum columns each row in multidimensional-array , compare them if number of result equals 15.
i think easier in double loop, 1 inside another, through rows , columns , compare them there think code put above have works.
with double loop mean:
for(int = 0; < array[1].length; i++) { for(int j = 0; j < array[0].length; j++) { //your code make sum } //your code compare if sum equals 15 } i expect helpful you!
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