22 February 2020 08:06:27 AM

ARRAYS
  C++ version

  Examples of array use.
  We show, in particular, a way that you can create and use
  a matrix (double dimensioned array) as though it were a
  single dimensioned array, as long as you are willing to
  compute the proper index yourself.

The statically dimensioned vector A:

       i    A[i]

       0     500
       1     501
       2     502
       3     503
       4     504
       5     505
       6     506
       7     507
       8     508
       9     509

The dynamically dimensioned vector B:

       i    B[i]

       0     500
       1     501
       2     502
       3     503
       4     504
       5     505
       6     506
       7     507
       8     508
       9     509

The statically dimensioned array C[][]:

       k       i       j C[i][j]

       0       0       0      11
       1       1       0      21
       2       2       0      31
       3       3       0      41
       4       4       0      51
       5       0       1      12
       6       1       1      22
       7       2       1      32
       8       3       1      42
       9       4       1      52
      10       0       2      13
      11       1       2      23
      12       2       2      33
      13       3       2      43
      14       4       2      53
      15       0       3      14
      16       1       3      24
      17       2       3      34
      18       3       3      44
      19       4       3      54
      20       0       4      15
      21       1       4      25
      22       2       4      35
      23       3       4      45
      24       4       4      55

The dynamically dimensioned column-major vector D[]:

       k       i       j D[i+j*5]

       0       0       0      11
       1       1       0      21
       2       2       0      31
       3       3       0      41
       4       4       0      51
       5       0       1      12
       6       1       1      22
       7       2       1      32
       8       3       1      42
       9       4       1      52
      10       0       2      13
      11       1       2      23
      12       2       2      33
      13       3       2      43
      14       4       2      53
      15       0       3      14
      16       1       3      24
      17       2       3      34
      18       3       3      44
      19       4       3      54
      20       0       4      15
      21       1       4      25
      22       2       4      35
      23       3       4      45
      24       4       4      55
      25       0       5      16
      26       1       5      26
      27       2       5      36
      28       3       5      46
      29       4       5      56
      30       0       6      17
      31       1       6      27
      32       2       6      37
      33       3       6      47
      34       4       6      57

The dynamically dimensioned row-major vector E[]:

       k       i       j E[i*7+j]

       0       0       0      11
       1       0       1      12
       2       0       2      13
       3       0       3      14
       4       0       4      15
       5       0       5      16
       6       0       6      17
       7       1       0      21
       8       1       1      22
       9       1       2      23
      10       1       3      24
      11       1       4      25
      12       1       5      26
      13       1       6      27
      14       2       0      31
      15       2       1      32
      16       2       2      33
      17       2       3      34
      18       2       4      35
      19       2       5      36
      20       2       6      37
      21       3       0      41
      22       3       1      42
      23       3       2      43
      24       3       3      44
      25       3       4      45
      26       3       5      46
      27       3       6      47
      28       4       0      51
      29       4       1      52
      30       4       2      53
      31       4       3      54
      32       4       4      55
      33       4       5      56
      34       4       6      57

ARRAYS:
  Normal end of execution.

22 February 2020 08:06:27 AM