/***
 * matrix_copy.c
 *
 * print a square matrix 
 * and make a copy
 *
 * $ gcc matrix_copy.c -o matrix_copy
 * $ ./matrix_copy
 *
 *
 *****/

#include <stdio.h>
#include <stdlib.h>

int* matrix_copy(int* matrix, int size){
  int i;
  int* duplicate;
  duplicate = malloc(sizeof(int) * size*size);
  for (i=0; i<(size*size); i++){
    duplicate[i] = matrix[i];
  }
  return duplicate;
}

void print_matrix(int* matrix, int size){
  int row, col;
  printf("[");
  for (row=0; row<size; row++){
    for (col=0; col<size; col++){
      printf("%d, ", matrix[row*size + col]);
    }
    if (row != size-1){
      printf(" \n ");
    }
    else {
      printf("]\n");
    }
  }
}

int main(){
  int i;
  int* matrix;
  int* matrix2;
  int size = 3; /* width = height of matrix */

  /* allocate space for the matrix */
  matrix = malloc(sizeof(int) * size*size);

  /* put some numbers into the matrix */
  for (i=0; i<(size*size); i++){
    matrix[i] = i+1;
  }

  print_matrix(matrix, size);

  matrix2 = matrix_copy(matrix, size);
  print_matrix(matrix2, size);

  return 0;
}