Hi i need help with the 2 functions in the code below so i can complete my assignment Please help me the code is in c++

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Hi i need help with the 2 functions in the code below so i cancomplete my assignment Please help me
the code is in c++
i just don't know how to do the code for voidclasses and void grades function
here is the txt file.
steve louis Slouis abg165 Bilogoy History GeographyEnglish PE French A B B C A A
Alexander grayson Agray adf1254 Algebra ChemistryHistory ELA PE spanish B B A A C A
Bretman lincon Blincon dafd 125 Calculus English HistoryELA HomeEc Spanish B A A A B A
Louis John Ljohn sfvdd 526 Calc Statistics HistoryCommunications PE Italian A B A B A A
Michael Smith mcham Mjhk456 Economics Algebra German PEBiology Calc A A A A A A
Min kim Mkim Mink 524 Geometry Calc Civics German PEPhysics A A A A A B
Jaxson Doe Jdoe hgyfi451 Geography Calc PE ItalianAlgebra Chemistry A A A A A A
Maria Appleton MariaA maria142 History Calc SpanishHistory Geometry Biology A A A A B C
Sam Smith Samsmith sammy523 Art Algebra SpanishChemistry Trigonometry History A A A B B A
Jaheyun Taylor JahTay jatate452 PE Physics Calculus2Chemistry Civics French B C B A A A
###Here is the code that needs to completed to open the.txt file####