嵌入式编程——数据结构与linux编程

根据dict.txt文件中的内容，用户输入单词获得单词含义         

#include "public.h" int main(void) { struct list_head *parray = NULL; FILE *fp = NULL; char *nret = NULL; char *pword = NULL; char *pparaphrase = NULL; int num = 0; char str[1024] = {0}; char word[256] = {0}; fp = fopen("./dict.txt", "r"); if(fp == NULL) { ERR_MSG("打开失败\n"); return -1; } parray = create_hashtable(); while(1) { nret = fgets(str, sizeof(str), fp); { if(nret == NULL) { break; } } pword = str; pparaphrase = str; while(1)//定位单词 { if(*pparaphrase == ' ') { *pparaphrase = '\0'; break; } pparaphrase++; } while(1)//定位释义 { pparaphrase++; if(*pparaphrase != ' ') { break; } } insert_hashtable(parray, pword, pparaphrase); } //show_hashtable(parray); while(1) { printf("输入1查询单词 任意键数字退出\n"); scanf("%d", &num); getchar(); if(num == 1) { printf("请输入要查询的单词\n"); gets(word); if(find_hashtable(parray, word) != NULL) { printf("%s \n", find_hashtable(parray, word)->paraphrase); } else { printf("未找到\n"); } } else { break; } } destroy_hashtable(parray); parray = NULL; fclose(fp); return 0; }

#ifndef __PUBLIC_H__ #define __PUBLIC_H__ #include "list.h" #include <stdio.h> #include <string.h> #include <stdlib.h> #include <sys/time.h> #include <errno.h> #include <error.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <unistd.h> #include <dirent.h> #include <time.h> //结构体 typedef struct hashnode { struct list_head node; char word[128]; char paraphrase[1024]; }hashnode_t; //打印出错信息 #define ERR_MSG(message) do { \ printf("[%s%7d]%s:%s\n", __FILE__, __LINE__, message, strerror(errno)); \ }while (0) //更新开始计时时间 #define GET_START_TIME do { \ gettimeofday(&starttime, NULL); \ } while (0) //更新结束计时时间 #define GET_END_TIME do { \ gettimeofday(&endtime, NULL); \ } while (0) //获得耗时时间 #define GET_CONST_TIME (((endtime.tv_sec * 1000000 + endtime.tv_usec) - (starttime.tv_sec * 1000000 + starttime.tv_usec)) / 1000.0) //哈希结构体参数 #define MAXNUM 52 //声明 extern struct list_head *create_hashtable(void); extern int insert_hashtable(struct list_head *pheadlist, char *pstr, char *pstd); extern int show_hashtable(struct list_head *pheadlist); extern hashnode_t *find_hashtable(struct list_head *pheadlist, char *pstr); extern int delete_hashtable(struct list_head *parray, char *pstr); extern int destroy_hashtable(struct list_head *parray); struct timeval starttime; struct timeval endtime; #endif