D01RJ_P0W_F C++ Header Example Program Results lower limit of integration (a) = 0 upper limit of integration (b) = 6.28319 absolute accuracy requested = 0 relative accuracy requested = 0.0001 maximum number of subintervals = 20 approximation to the integral : -2.5433e+00 estimate of the absolute error : 1.2752e-05 number of function evaluations : 19