c - 我的程序没有按预期工作

Question

我需要找到一些字符串的位置。这些字符串存储在名为 queryfile 的文件中，来自另一个名为 datafile 的文件。

但是，我的程序没有按预期运行。有人可以帮助我吗？

我的程序

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main()
{
    FILE *queryfile;
    queryfile = fopen("op2query.txt","r");

    FILE *datafile;
    datafile = fopen("op2data.txt","r" );

    int i = 1;
    char word[99];
    char search[99];

    if(queryfile==NULL) {
      printf("Error in reading Query File");
      exit(1);
    }
    if(datafile==NULL) {
      printf("Error in reading Data File");
      exit(1);
    } 

     while(fscanf(queryfile,"%98s",search)==1){  
         while(fscanf(datafile,"%98s",word)==1){
             if (strcmp(word,search)==0){
                 printf("\n %i %s ", i, search);
                 rewind(datafile);
                 i=1;
                 break;
              }
              else 
                 i++;   
         }
     }

    fclose(datafile);
    fclose(queryfile);
    return 0;
    }

Answer 1

我通过将查询字符串拆分为单词来构建每组要测试的单词的数组。这些词可以跨越数据文件中的换行符。我将数据文件位置标记在集合的第二个词上，如果搜索失败，我会寻找该点(如有必要)。即使我复制数据文件中的每个单词“age”，该程序也会成功。

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define MAXWORDS    5
#define MAXLEN      99

int main()
{
    int j, i, done, words, count;
    long mark;
    char word[MAXLEN];
    char search[MAXLEN];
    char *tok, *sptr[MAXWORDS];
    FILE *queryfile;
    FILE *datafile;

    if ((queryfile = fopen("op2query.txt","r")) == NULL) {
         printf("Error in reading Query File");
         exit(1);
    }
    if ((datafile = fopen("op2data.txt","r" )) == NULL) {
         printf("Error in reading Data File");
         exit(1);
    } 

    while(fgets(search, MAXLEN, queryfile) != NULL){
        words = 0;
        done = 0;
        count = 0;
        mark = -1;
        tok = strtok(search, " \r\n");
        while (tok && words < MAXWORDS) {       // build array of query
            sptr[words++] = tok;
            tok = strtok(NULL, " \r\n");        // strips newline too
        }
        if (words < 1)                          // no more queries
            break;
        rewind(datafile);                       // beginning of file

        while (!done) {                         // until none to read
            count++;
            if (mark >= 0)                      // when more than one word to search
                fseek (datafile, mark, SEEK_SET);
            mark = -1;
            for (j=0; j<words; j++) {
                if (j == 1)                     // mark for next search
                    mark = ftell(datafile);
                if (fscanf(datafile, "%98s", word) != 1){
                    done = 1;                   // end of file
                    break;
                }
                if (strcmp(sptr[j], word)!=0)
                    break;                      // failed multi word search
            }
            if (done) 
                printf("NOT FOUND!");
            else if (j == words) {              // if all words found
                printf("%d", count);
                done = 1;                       // success
            }
        }
        for (i=0; i<words; i++)
            printf(" %s", sptr[i]);             // show array of words asked
        printf("\n");
    }
    fclose(datafile);
    fclose(queryfile);
    return 0;
}

程序输出:

18 wisdom
40 season
NOT FOUND! summer
22 age of foolishness

更新 - 当查询未找到时，我打印NOT FOUND!。在查询文件中添加了“summer”。