numerical_integration.h

在程序设计部分主要讨论了在读写函数表达式时

#ifndef NUMERICAL_INTEGRATION_H
#define NUMERICAL_INTEGRATION_H


#ifdef _cplusplus
	extern "C" {
#endif


#include "ERRNO.h"
#include "parse_string.h"


#define TRAPEZOIDAL 		0x00000400l
#define SIMPSON				0x00000800l
#define COTES               0x00001000l
#define ROMBERG             0x00002000l


typedef struct
{
	unsigned long int status;
	unsigned long int total_iter;
	unsigned long int iter_t;
	unsigned long int iter_sim;
	unsigned long int iter_cote;
	unsigned long int iter_rom;
	unsigned long int iter_max;
	double *t_value;
	double *sim_value;
	double *cote_value;
	double *rom_value;
	double *t_precision;
	double *sim_precision;
	double *cote_precision;
	double *rom_precision;
	double final_precision;
	double result;
	double integration_start;
	double integration_end;
} Iter_result;


typedef struct tag_data
{
	double t_value;
	double sim_value;
	double cote_value;
	double rom_value;
	double precision;
	double preci_t;
	double preci_sim;
	double preci_cote;
	double preci_rom;
	struct tag_data *next;
} Iter_node;



extern int numerical_integration(char *fun, Var_name_list *name, Iter_result *result);

extern void free_iter_result(Iter_result *result);


#ifdef _cplusplus
	}
#endif	

#endif /*NUMERICAL_INTEGRATION_H*/