/* Some utility routines in utility.c */double uniform_random(void);double gaussian_random(void);double evaluate_gaussian(double val, double sigma);/* The model-specific functions from model_specific.c */void initialise_model_specific_defaults(void);void set_up_prior_conditions(void);void obtain_observations(void);void predict_sample_position(int new_sample, int old_sample);double evaluate_observation_density(int new_sample);void display_data(int iteration);