This shows how to write programs that call Numerical Recipres functions, how to compile and link these programs. The Numerical Recipes Library libnrecc.a is located in the directory /usr/local/nrcp/   in the machines in the Physics Computer Lab.   All the header files are also in this directory. The source code is available in the directory /usr/local/nrcp/C/ansi-c/ .

Download the files libnrecc.a, nrutil.h and nr.h into your working directory if you not using a computer in the Physics Lab.  The compiling and linking commands are also slightly different. 

The program nrcp_test.cintegrates two functions f(x)=1   and g(x)=x  from  the limits 0 to 1.  It uses the function qsimp to do the integration.

To compile and link the program in the Physics Lab

cc -c nrcp_test.c -I/usr/local/nrcp/                  

cc -o  nrcp_test  nrcp_test.o  -L/usr/local/nrcp/ -lnrecc -lm

To compile and link the program in CIC or  elsewhere

cc -c nrcp_test.c

cc -o  nrcp_test  nrcp_test.o   -lnrecc -lm

To run

./nrcp_test

Sample program (prog.c) for solving a set of orinary differential equations (ODEs) using the Numerical Recipes function odeint(). This program evolves  the position and momentum of a simple harmonic oscillalor which starts from rest at x=1.