#include <conio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define szWORD 32
#define szSTRN 224
#define szITEM sizeof(struct TItem)
char fileDict[szSTRN];
typedef struct TItem {
char word[szWORD];
char mean[szSTRN];
} Item;
fpos_t lookup(char *word, char *mean)
{
FILE * f = 0; Item i;
int r = 0; fpos_t p = 0;
if(!word) return 0;
f = fopen(fileDict, "rb");
if (!f) return 0;
while(!feof(f)) {
fgetpos(f, &p);
r = fread(&i, szITEM, 1, f);
if(r < 1) break;
if(i.word[0] == 0) continue;
if(strcmp(i.word , word)) continue;
if(mean) strcpy(mean, i.mean );
fclose(f);
return p+1;
}
fclose(f);
return 0;
}
void append(void)
{
Item i; FILE * f = 0; fpos_t p = 0;
memset(&i, 0, szITEM);
printf("請輸入單詞："); scanf("%s", i.word );
p = lookup(i.word, 0 );
if(p) {
printf("字典內已經有該單詞記錄！\n");
return;
}
printf("請輸入釋義，按回車結束：");
fflush(stdin);
gets(i.mean );
f = fopen(fileDict, "ab");
fwrite(&i, szITEM, 1, f);
fclose(f);
printf("詞條已新增\n");
}
void erase(void)
{
Item i; FILE * f = 0; fpos_t p = 0;
memset(&i, 0, szITEM);
printf("請輸入單詞："); scanf("%s", i.word );
p = lookup(i.word, 0 );
if(p==0) {
printf("字典內沒有該單詞記錄！\n");
return;
}
p--;
memset(&i, 0, szITEM);
f = fopen(fileDict, "rb+");
fsetpos(f, &p);
fwrite(&i, szITEM, 1, f);
fclose(f);
printf("詞條已刪除\n");
}
void edit(void)
{
Item i; FILE * f = 0; fpos_t p = 0;
memset(&i, 0, szITEM);
printf("請輸入單詞："); scanf("%s", i.word );
p = lookup(i.word, 0 );
if(p==0) {
printf("字典內沒有該單詞記錄！\n");
return;
}
p--;
printf("請輸入釋義，按回車結束（輸入abort放棄修改）：");
fflush(stdin);
gets(i.mean );
if(strstr(i.mean ,"abort")) {
printf("已放棄修改！\n");
return ;
}
f = fopen(fileDict, "rb+");
fsetpos(f, &p);
fwrite(&i, szITEM, 1, f);
fclose(f);
printf("詞條已保存\n");
}
void query(void)
{
Item i; fpos_t p = 0;
memset(&i, 0, szITEM);
printf("請輸入單詞："); scanf("%s", i.word );
p = lookup(i.word, i.mean );
if(p==0) {
printf("字典內沒有該單詞記錄！\n");
return;
}
printf("詞條%s\n釋義%s", i.word , i.mean );
}
void set(void)
{
int cmd = 0;
printf("當前字典為%s，需要改變嗎（選擇y或Y改變）？", fileDict);
cmd = getch();
if(cmd == 'y' || cmd == 'Y') {
printf("請輸入字典文件名稱（包含路徑）：");
scanf("%s", fileDict);
printf("設置成功！\n");
}
}
int main(int argc, char * argv[])
{
int cmd = 0;
if(argc >1)
strcpy(fileDict, argv[1]);
else
strcpy(fileDict, "c:\\dict.txt");
/*end if*/
for(;;) {
printf("\n\
************************\n\
** 歡迎使用迷妳字典！**\n\
************************\n\
** 0 - 設置字典 **\n\
** 1 - 查詢詞條 **\n\
** 2 - 新增詞條 **\n\
** 3 - 編輯詞條 **\n\
** 4 - 刪除詞條 **\n\
** 5 - 退出字典 **\n\
************************\n");
cmd = getch() - '0';
switch(cmd) {
case 0: set(); break;
case 1: query(); break;
case 2: append(); break;
case 3: edit(); break;
case 4: erase(); break;
default: return 0;
}
}
return 0;
}