动物识别系统：基于规则的知识库与数据库交互

#include <string.h>
#include <math.h>
#include <stdio.h>
#include <iostream.h>
#define True 1
#define False 0
#define DontKnow -1
//事实集（概念集）-------------------------------------
char *str[]={"chew_cud反刍动物","hooves蹄类动物","mammal哺乳动物","forward_eyes眼盯前方","claws有爪","pointed_teeth有犬齿","eat_meat吃肉","lay_eggs会下蛋","fly会飞","feathers有羽毛","ungulate有蹄","carnivore食肉动物","bird鸟","give_milk能产奶","has_hair有毛发","fly_well善飞","black&white_color黑白色","can_swim会游泳","long_legs长腿","long_neck长脖子","black_stripes黑条纹","dark_spots黑斑点","tawny_color黄褐色","albatross信天翁","penguin企鹅","ostrich驼鸟","zebra斑马","giraffe长颈鹿","tiger老虎","cheetah猎豹",0};

//规则之前件（条件）集--------------------------
int rulep[][6]={{22,23,12,3,0,0},{21,23,12,3,0,0},{22,19,20,11,0,0},
{21,11,0,0,0,0},{17,19,20,13,-9,0},{17,18,13,-9,0,0},{16,13,0,0,0,0},
{15,0,0,0,0,0},{14,0,0,0,0,0},{10,0,0,0,0,0},{8,7,0,0,0,0},
{7,0,0,0,0,0},{4,5,6,0,0,0},{2,3,0,0,0,0},{1,3,0,0,0,0}};

//规则之后（结论）集，注意与上面对应----------------
int rulec[]={30,29,28,27,26,25,24,3,3,13,13,12,12,11,11,0};

class fact
{private:
 int Number;
 char Name[21];
 int Active;
 int Succ;
 public:
 fact *Next;
 fact(int Num,char *L)
 {
  strcpy(Name,L);

  Number=Num;
  Active=False;
  //-1 是已经推理，不符合。1 是已经推理，符合。
  Succ=DontKnow; //0 是无，-1 是不知道，1 是有。
  Next=NULL;
 }
 char *GetName()
 {
 char *L;
 L=new char[21];
 strcpy(L,Name);
 return L;
 }
 int GetNumber()
 {
 return Number;
 }
 int GetAct()
 {
 return Active;
 }
 int GetSucc()
 {
 return Succ;
 }
 void PutAct(const int Act0,int Suc0)
 {
 Active=Act0;
 Succ=Suc0;
 }