Compilation instructions are in the comments at the beginning of each program. These programs require the NetCDF libraries, which can be obtained from UNIDATA.
Please note: these are only subroutines and REQUIRE you to write a main program.
C version
readncdf.c (1 degree or .5 degree)
FORTRAN versions
readncdf_1d.f (1 degree)
readncdf_hd.f (.5 degree)
Interactive Data Language (IDL) versions
readncdf.pro (1 degree or .5 degree)