Hey, im really new to c++ im in like a class right now at my school, but anyway. I use Larewnseville press textbooks they have an lvp folder. and i downloaded that from their site. its libraries for the include statements, anyway whenever i try to incluse the lvp/string library it gives me these errors:

c:\program files\microsoft visual studio\vc98\include\lvp\string.cpp(59) : error C2065: 'strlen' : undeclared identifier
c:\program files\microsoft visual studio\vc98\include\lvp\string.cpp(62) : error C2065: 'strcpy' : undeclared identifier
c:\program files\microsoft visual studio\vc98\include\lvp\string.cpp(346) : error C2065: 'strncmp' : undeclared identifier
c:\program files\microsoft visual studio\vc98\include\lvp\string.cpp(374) : error C2065: 'strcmp' : undeclared identifier
Error executing cl.exe.

Anyone know whats wrong?
thanks in advance guys im gunna like fail this class if i dont get help this weekend