Debugging

As we discussed in class, using fourth-order Runge-Kutta to solve $F'(x)=g(x)$ is equivalent to integrating $\int g(x) \, dx$ with Simpson's rule. Debug your ODE programs using the program ``rk4debug.c'' provided in Appendix A to compare the results of Runge-Kutta and Simpson's rule for this integration. Be sure to place your ``derivs_int'' at the top of the file in the indicated location.