/*

  C Primer Plus
  Chapter 10: Arrays and Pinters.
  Programming Exercise 7:

  Write a program that initializes a two-dimensional array-of- double and uses one of the
  copy functions from exercise 2 to copy it to a second two-dimensional array. (Because a
  two-dimensional array is an array of arrays, a one-dimensional copy function can be used
  with each subarray.)

*/

#include <stdio.h>
#define SIZE_1 3 //COLS
#define SIZE_2 2 //ROWS

void copy_arr_1D (int , double [], double []);
void copy_arr_2D (int, int , double [][SIZE_1], double [][SIZE_1]);

void print_arr_1D (int , double []);
void print_arr_2D (int , int, double [][SIZE_1]);

int main(void) {

  double target[SIZE_2][SIZE_1] = {0};
  double source[SIZE_2][SIZE_1] = {
                                    {1.1, 1.2, 1.3},
                                    {2.1, 2.2, 2.3}
                                  };

  copy_arr_2D(SIZE_2, SIZE_1, target, source);
  print_arr_2D(SIZE_2, SIZE_1, target);

  return 0;
}

//---------------------------------------------------------------
void copy_arr_1D (int size_1, double target[], double source[]) {
  for (int i = 0; i < size_1; i++) {
    target[i] = source[i];
  }
}

//---------------------------------------------------------------
void copy_arr_2D (int size_2, int size_1, double target[][size_1], double source[][size_1]) {
  for (int i = 0; i < size_2; i++) {
    copy_arr_1D(size_1, target[i], source[i]);
  }
}

//---------------------------------------------------------------
void print_arr_1D (int size_1, double arr[]) {
  for (int i = 0; i < size_1; i++) {
    printf("%f\t", arr[i]);
  }
}

//---------------------------------------------------------------
void print_arr_2D (int size_2, int size_1, double arr[][size_1]) {
  for (int i = 0; i < size_2; i++) {
    print_arr_1D(size_1, arr[i]);
    printf("\n");
  }
}