My program not work as expected - c

Question

I need to find the position of some strings. These strings are stored in a file named queryfile , from an other file named datafile.
However, my program does not work as expected.
Can some one help me?
My program
#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

I build an array of each set of words to be tested, by splitting the query string into words. These words can span a line break in the data file. I mark the data file position on the second word of the set, if the search fails I seek to that point (if necessary). The program succeeds even if I duplicate every word "age" in the data file.
#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;
}
Program output:
18 wisdom
40 season
NOT FOUND! summer
22 age of foolishness
UPDATE - I print NOT FOUND! when query not found. Added "summer" to query file.

Answer 2

you should put some debug-output behind the fscanf-calls (like printf("search:<%s> word:<%s>", search, word);
Then you will see, that fscanf stops at finding a white-space. you compare wisdom to each consecutive word in op2data.txt.
You should read line by line with fgets() removing the CR/LF from search.
But be aware, that the multi-word-search-word in data-file may be split between lines. like:
find me
i am the text to find
me in this file
so a better solution would be:
read search word by line (remove CR/LF) (normalize it by removing double spaces and not-letters)
read a chunk from datafile and normalize it too.
compare or continue by moving the read-position in data left by length of length of search word