Fortran with C

Hi everybody,

I use intel visual fortran composer xe 2013 with VS2012.

I have 3 questions:

1-I have a problem debugging a simple fortran code that calls a C function. When i compile the fortran code on VS2012 i get the following message: Error    2     error LNK2019: unresolved external symbol _print_C referenced in function _MAIN__    Source1.obj.  I attached the fortran and c files.

2-When i compile any fortran code on VS2012 i have no problem at all, but if i use a command prompt and type ifort example.f90 i receive the following message 'ifort' is not recognized as an internal or external command. I know i should do something to link ifort into compiling with a command prompt window but i don't know what it is. I read the documentation and i couldn't find what i need.

3-I bought the fortran composer xe like 2 years ago, now i was checking and there's something called parallel xe 2015, so is this the new version of composer xe or something different ?

Thanks in advance,

Li