Can you recollect the exercise about examinations you did in the previous chapter? You created an incremental file with examination results. The final file looked like the following:
--------------------------------------------------------- Annual Language Examinations Testing writing, reading, speaking and listening skills --------------------------------------------------------- student_code;name;writing;reading;speaking;listening;file_processed;process_date 80711-85;William Miller; 81;83;80;90;C:\pdi_files\input\first_turn.txt;28-05-2009 20362-34;Jennifer Martin; 87;76;70;80;C:\pdi_files\input\first_turn.txt;28-05-2009 75283-17;Margaret Wilson; 99;94;90;80;C:\pdi_files\input\first_turn.txt;28-05-2009 83714-28;Helen Thomas; 89;97;80;80;C:\pdi_files\input\first_turn.txt;28-05-2009 61666-55;Maria Thomas; 88;77;70;80;C:\pdi_files\input\first_turn.txt;28-05-2009 ...
Now you want to convert all grades in the scale 0-100 to...