9 x 9 matrix

#include <stdio.h>
#include <stdlib.h>
int main(void) {
  int i, j;
  char **matrix = (char **) malloc(9 * sizeof(char *));
  const char **pmatrix = (const char **) malloc(9 * sizeof(char *));
  for (i = 0; i < 9; i++) {
    char *row = matrix[i] = (char *) malloc(9 * 3 + 1 + 1);
    for (j = 0; j < 9; j++) {
      sprintf(row, "%3d", (i + 1) * (j + 1)); row += 3;
    }
    sprintf(row, "\n");
  }
  for (i = 0; i < 9; i++) pmatrix[i] = matrix[i];
  for (i = 0; i < 9; i++) printf("%s", pmatrix[i]);
  return 0;
}