java native inteface (jni) problem

i have a scientific code written in c language and i want to call that code in my java program through java native interface(jni), the problem i am facing is i am unable to find CL compiler for c sourcecode, so i am not able to form the required dll.
can any one suggest me the appropriate cl compiler and where can i get it (if possible url for download)

Go here for a very cool and best of all free C/C++ IDE/compiler.
It's called Dev-C++.