I'm trying to make function for transposing matrix.
Here I create a matrix, passing it to my function and got "segmentation fault" on line 20, but I can't figure out why, please help. I'm (almost) sure I not get out from allocated memory, and I'm passing matrix as "int ***"... For simplicity didn't make here memory free and output.
Also, I'll be glad for any comments and tips about this code.
#include <stdlib.h>
void transpose(int ***matrix, int *n, int *m) {
// create additional matrix
int **new_matrix = malloc(sizeof(int *) * (*m));
for (int i = 0; i < *m; i++)
new_matrix[i] = malloc(sizeof(int) * (*n));
// store data in new matrix tranposing it
for (int i = 0; i < *m; i++)
for (int j = 0; j < *n; j++)
new_matrix[i][j] = (*matrix)[j][i];
// realloc initial matrix to fit transposed matrix
for (int i = 0; i < *m; i++)
(*matrix)[i] = realloc(*matrix, sizeof(int) * (*n));
*matrix = realloc(*matrix, sizeof(int *) * (*m));
// trying to write data from new array to initial
for (int i = 0; i < *m; i++)
for (int j = 0; j < *n; j++)
// got segmentation fault here:
(*matrix)[i][j] = new_matrix[i][j];
}
int main() {
// create array: 0 1 2
// 3 4 5
int n = 2, m = 3;
int **matrix = malloc(sizeof(int *) * n);
for (int i = 0; i < n; i++)
matrix[i] = malloc(sizeof(int) * m);
for (int i = 0; i < n; i++)
for (int j = 0; j < m; j++)
matrix[i][j] = i * m + j;
// trying to transpose:
transpose(&matrix, &n, &m);
return 0;
}
