*&---------------------------------------------------------------------*
*& Report  ZLR_LIB_HPL_CH_01_VOWELS
*&
*&---------------------------------------------------------------------*
*& Description:
*&   Return the number of vowels in a string
*&   Create a function that'll return an integer of the number of vowels
*&   found in a string. This is a great way to practice determining the
*&   features of a dataset. If you use JavaScript later in your career,
*&   you'll be well-prepared to determine what datasets (or just strings)
*&   consist of. If you feel like an extra challenge, consider returning
*&   the number of characters.
*&
*& Technical description:
*&
*&
*&---------------------------------------------------------------------*
*& Change log:
*& Date       Author       Action
*& XXXX-XX-XX ABAP ACADEMY Created
*&
*&---------------------------------------------------------------------*

REPORT zlr_lib_hpl_ch_01_vowels.

*-----------------------------------*
* DECLARATIONS

CONSTANTS:
  gc_original_string type string VALUE 'Enjoy coding',
  gc_list_of_vowels  type c LENGTH 6 VALUE 'aeiouy'.

DATA:
  gv_vowels_counter type i,
  gv_string_offset  type i,
  gv_lenght_of_original_string type i,
  gv_current_char_from_string type c.

*-----------------------------------*
* MAIN LOGIC

" Get the lenght of original string to be able to know how many times
" we need to do DO cycle
gv_lenght_of_original_string = strlen( gc_original_string ).

" Vowels couunting algorithm
DO gv_lenght_of_original_string TIMES.

  gv_current_char_from_string = gc_original_string+gv_string_offset(1).

  IF gv_current_char_from_string CA gc_list_of_vowels.

    gv_vowels_counter = gv_vowels_counter + 1.

  ENDIF.

  gv_string_offset = gv_string_offset + 1.

ENDDO.

WRITE: 'Original String:', gc_original_string.
WRITE: / 'Number of Vowels:', gv_vowels_counter.