Does anyone know which include file is needed for functions; IsLetter (ch) and ToLower(ch) ?

Dick

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ctype.h ? I dunno.

Yes it belongs to the cctype header in C++ and ctype.h in C.

>oes anyone know which include file is needed for functions; IsLetter (ch) and ToLower(ch) ?
There are no such functions in standard C++. The cctype header has isalpha and tolower, which is probably what you're referring to.

Thank you all very much for the help it's appreciated.
Dick

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