import java.util.Arrays;
public class MatrixSpecificRowToZero_Java {
public static void printMatrix(int[][] matrix) {
int cols = matrix[0].length;
int rows = matrix.length;
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
System.out.printf("%4d ", matrix[i][j]);
}
System.out.println();
}
}
public static boolean matrixRowIncludesNumber(int[][] matrix, int row, int number) {
int cols = matrix[0].length;
for (int j = 0; j < cols; j++) {
if (matrix[row][j] == number) {
return true;
}
}
return false;
}
public static void setMatrixRowToZero(int[][] matrix, int row) {
Arrays.fill(matrix[row], 0);
}
public static void main(String[] args) {
int[][] matrix = {
{ 4, 7, 9, 18, 29, 0 },
{ 1, 9, 18, 99, 4, 3 },
{ 9, 17, 89, 0, 7, 5 },
{ 19, 49, 6, 1, 9, 8 },
{ 29, 4, 7, 9, 18, 6 }
};
int row = 2;
if (matrixRowIncludesNumber(matrix, row, 0)) {
setMatrixRowToZero(matrix, row);
}
printMatrix(matrix);
}
}
/*
run:
4 7 9 18 29 0
1 9 18 99 4 3
0 0 0 0 0 0
19 49 6 1 9 8
29 4 7 9 18 6
*/