cc_1_7.java

/*
  Created by bitcpf
 */


public class Replacezero {
	
	
	public static int[][] setzero(int[][] matrix){
		int[] zero_row = new int[matrix.length];
		int[] zero_col = new int[matrix[0].length];
		for (int i = 0;i < matrix.length; i ++){
			for(int j = 0; j< matrix[0].length; j ++){
				if(matrix[i][j] == 0){
					if(zero_row[i] == 0){
						zero_row[i] = 1;
					}
					if(zero_col[j] == 0){
						zero_col[j] = 1;
						}
					
				}

			}
		}

		
		// Set zero for columns
		for (int i =0; i<matrix.length; i ++){
			if(zero_row[i] == 1){
				for(int j = 0; j< matrix[0].length; j++){
					matrix[i][j] = 0;
				}
			}
		}
		// Set zero for rows
		for (int i =0; i<matrix[0].length; i ++){
			if(zero_col[i] == 1){
				
				for(int j = 0; j< matrix.length; j++){
					matrix[j][i] = 0;
				}
			}
		}
		
		
		return matrix;
	}
	
	public static void printmax(int[][] matrix){
		for (int i = 0; i < matrix.length; i ++){
			for (int j = 0; j < matrix[0].length; j++){
				System.out.print(matrix[i][j]+" ");
			}
			System.out.println("");
		}
	}
	
	public static void main(String[] args){
		
		int[][] testmax = new int[][]{{1,2,0,3},{4,1,5,6},{7,8,9,0}};
		printmax(testmax);
		System.out.println();
		printmax(setzero(testmax));
	}
}