# How to set a specific row of a matrix to zero if a particular element in that row is zero with C

7 views
edited 6 days ago

```#include <stdio.h>

#define COLS 6

void print_matrix(int matrix[][COLS], int rows, int cols) {
int i, j;

for (i = 0; i < rows; i++) {
for (j = 0; j < cols; j++) {
printf("%5i", matrix[i][j]);
}

printf("\n");
}
}

int matrix_row_include_number(int matrix[][COLS], int row, int cols, int number) {
for (int j = 0; j < cols; j++) {
if (matrix[row][j] == number) {
return 1;
}
}

return 0;
}

void set_matrix_row_to_zero(int matrix[][COLS], int row, int cols) {
for (int j = 0; j < cols; j++) {
matrix[row][j] = 0;
}
}

int main() {
int matrix[][COLS] = {
{ 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 (matrix_row_include_number(matrix, row, COLS, 0)) {
set_matrix_row_to_zero(matrix, row, COLS);
}

int rows = sizeof(matrix) / sizeof(matrix[0]);

print_matrix(matrix, rows, COLS);

return 0;
}

/*
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

*/```

Learn & Practice Python
with the most comprehensive set of 13 hands-on online Python courses
Start now