/*
 * This program tests if a square double array has any row or column
 * full of zeroes
 * @author Jose V Nunez
 * license: GPL
 * Blog: El Angel Negro - http://elangelnegro
 */
public class SquareMatrix {
        
        /**
         * Command line test
         * @param args
         */
        public static void main(String [] args) {
                int [][] hasZeros = {
                        {0, 8, 0, 3, 0},
                        {0, 1, 2, 0, 0},
                        {0, 0, 3, 0, 2},
                        {1, 5, 0, 6, 0},
                        {0, 0, 0, 0, 0}
                };
                
                int [][] noZeros = {
                        {0, 8, 0, 3, 0},
                        {0, 1, 2, 0, 0},
                        {4, 0, 3, 0, 2},
                        {0, 5, 0, 6, 0},
                        {0, 0, 1, 0, 0}
                };
                
                if (hasZero(hasZeros)) {
                        System.out.println("Has zeros");
                }
                if (! hasZero(noZeros)) {
                        System.out.println("Has no zeros");
                }
        }
        
        /**
         * Detect if a square array has a file or row full of zeroes
         * @param a The double array to check
         * @return boolean
         */
        public static boolean hasZero(int [][] a) {
                boolean status = false;
                int rowLength = a.length;
                int colLength = rowLength;
                for (int i = 0; i < rowLength; i++) {
                        int colCount = 0;
                        int rowCount = 0;
                        for (int j = 0; j < colLength; j++) {
                                colCount += a[i][j];
                                rowCount += a[j][i];
                        }
                        // Count at the end of the row
                        if (colCount == 0 || rowCount == 0) {
                                status = true;
                                return status;
                        }
                }
                return status;
        }
}