some linker errors ...
But it sounds like you build with .c files and use the C-Compiler.
The functions in iostream are part of the C++ standard library, which you usually don't need to link explicitly. If you need to link it explicit something in you project definition goes totaly wrong or overload something or link against some strange other libs.
Unresolved External means mostly that your linker can't resolve them. So there is no lilbrary inside your linking definition.
Br,
Eike
