Long story short I've tried using Visual Studio to get back into programming and I'm writing simple programs at the moment but I've come across this snag. I can't seem to get any of the character string functions to work.
For example the ischar() or isletter() function. I've added the string and math headers but the compiler still doesn't recognise the functions. Does anyone have an idea of what could be wrong Thanks
character string functions in C++
lmike
The functions you are after are in the ctype.h header. And as Mike Danes said, they are isalpha, isalnum, isdigit etc.
For more information on these functions see the crt reference.
http://msdn.microsoft.com/library/en-us/vclib/html/_crt_run.2d.time_routines_by_category.asp
Or for the character classification functions.
http://msdn.microsoft.com/library/en-us/vclib/html/_crt_character_classification.asp
Pravin Indurkar - MSFT
vitallis
I'm not aware of such functions (ischar, isletter) in C++. Perhaps you are looking for isalpha, isalnum, isdigit, islower, isupper, ispace... functions