/* nag_pde_bs_1d (d03ncc) Example Program. * * Copyright 2001 Numerical Algorithms Group. * * Mark 7, 2001. */ #include #include #include #include #include #include #define F(I,J) f[ns*((J)-1)+(I)-1] #define THETA(I,J) theta[ns*((J)-1)+(I)-1] #define DELTA(I,J) delta[ns*((J)-1)+(I)-1] #define GAMMA(I,J) gamma[ns*((J)-1)+(I)-1] #define LAMBDA(I,J) lambda[ns*((J)-1)+(I)-1] #define RHO(I,J) rho[ns*((J)-1)+(I)-1] int main(void) { double alpha, x; Integer i, igreek, j, ns, nt, ntkeep, exit_status; double *delta, *f, *gamma, *lambda, q[3], r[3], *rho, *s, sigma[3], *t, *theta, smin, smax, tmin, tmax; Nag_Boolean gprnt[5]={Nag_TRUE, Nag_TRUE, Nag_TRUE, Nag_TRUE, Nag_TRUE}; Nag_Boolean tdpar[3]; const char *gname[5]={"Theta", "Delta", "Gamma", "Lambda", "Rho"}; NagError fail; /* Skip heading in data file */ Vscanf("%*[^\n] "); exit_status = 0; /* Read problem parameters */ Vscanf("%lf", &x); Vscanf("%ld%ld", &ns, &nt); Vscanf("%lf%lf", &smin, &smax); Vscanf("%lf%lf", &tmin, &tmax); Vscanf("%lf", &alpha); Vscanf("%ld", &ntkeep); /* Allocate memory */ if ( !(s = NAG_ALLOC(ns, double)) || !(t = NAG_ALLOC(nt, double)) || !(f = NAG_ALLOC(ns*ntkeep, double)) || !(theta = NAG_ALLOC(ns*ntkeep, double)) || !(delta = NAG_ALLOC(ns*ntkeep, double)) || !(gamma = NAG_ALLOC(ns*ntkeep, double)) || !(lambda = NAG_ALLOC(ns*ntkeep, double)) || !(rho = NAG_ALLOC(ns*ntkeep, double)) ) { Vprintf("Allocation failure\n"); exit_status = 1; goto END; } INIT_FAIL(fail); Vprintf("nag_pde_bs_1d (d03ncc) Example Program Results\n\n"); /* Set up input parameters for nag_pde_bs_1d (d03ncc) */ s[0] = smin; s[ns-1] = smax; t[0] = tmin; t[nt-1] = tmax; tdpar[0] = Nag_FALSE; tdpar[1] = Nag_FALSE; tdpar[2] = Nag_FALSE; q[0] = 0.0; r[0] = 0.10; sigma[0] = 0.4; /* Call Black-Scholes solver */ /* nag_pde_bs_1d (d03ncc). * Finite difference solution of the Black-Scholes equations */ nag_pde_bs_1d(Nag_AmericanPut, x, Nag_UniformMesh, ns, s, nt, t, tdpar, r, q, sigma, alpha, ntkeep, f, theta, delta, gamma, lambda, rho, &fail); if (fail.code != NE_NOERROR) { Vprintf("Error from nag_pde_bs_1d (d03ncc).\n%s\n", fail.message); exit_status = 1; goto END; } /* Output option values */ Vprintf("\n"); Vprintf("Option Values\n"); Vprintf("-------------\n"); Vprintf(" Stock Price | Time to Maturity (months)\n"); Vprintf(" | "); for (i=0; i