check_num_args - Checks the number of program arguments
Example compile flags (system dependent):
-DLINUX_X86_64 -DLINUX_X86_64_OPTERON -DGNU_COMPILER
-lKJB -lfftw3 -lgsl -lgslcblas -ljpeg -lSVM -lstdc++ -lpthread -lSLATEC -lg2c -lacml -lacml_mv -lblas -lg2c -lncursesw
const char *usage
This routine checks the number of program arguments, and if they are not
within the bounds set by the parameters, then it prints and error message to
that effect and exits.
value of argc. The first argument is usually the program name, and we don't
count that here.
This software is not adequatedly tested. It is recomended that
results are checked independantly where appropriate.