Could you post your entire c file? Something else is wrong. Unless you modified one of these files then your code should compile. I think Dev-C++ uses 2.95 which doesn't even comment on the new standard as far as includes go, and even then your error would be:

C:\COMP\MINGW\include\c++\3.2\backward\backward_wa rning.h:32
#warning This file includes at least one deprecated or antiquated header. Please consider using one of the 32 headers found in section 17.4.1.2 of the C++ standard. Examples include substituting the <X> header for the <X.h> header for C++ includes, or <sstream> instead of the deprecated header <strstream.h>. To disable this warning use -Wno-deprecated.
So I'm sure something else is wrong.