How to comape tokenised strings?? 1

[lbucko]

I have a file which contains certain text strings. I also have a char array which contains a query string. I have tokenised both strings to take one word at at a time but am unsure as how to compare the tokens to find out if there is a match between them. What I am trying to achieve is to search a file for a given text query, Code is as follows:

void smart_2(char *query, Res results[][100])
	{
		
		char string[] = "Distributed IR";
		char *tokenPtr;		//Token Ptr to query file
		char *ttokenPtr;	//Token Ptr to initial query string
		
		fp = fopen("query_file.txt", "r");	//Query file
		ffp = fopen("temp.txt", "w");		//Temp file to write tokens to

		while(!feof(fp))
		{
			fprintf(ffp, "%s\n", " ", string);
			
			tokenPtr = strtok(string, " ");

			while(tokenPtr != NULL)
			{
				fscanf(fp,"%s", strtok);
				fprintf(ffp, "%s\n", tokenPtr);
				
				tokenPtr = strtok(NULL, " ");
			}//while tokPtr

		}//while eof

		printf("%s\n", " ", query);
		ttokenPtr = strtok(query, " ");

		while(ttokenPtr !=NULL)
		{
			printf("%s\n", ttokenPtr);
			ttokenPtr = strtok(NULL, " ");
		}//while ttokPtr

	}//smart_2

Any ideas on how to do this or improvements would be appreciated.

 

[Leibnitz]

If you are only searching for a given text query,perhaps you dont need to tokenised the strings,you only need to use "strstr" to find the specific text query that you are searching for.

try this:

bool SearchQuery( FILE *file, char *string )
{
bool found = false;
char phrase[100]; // you have to choose any convenient size for this array
int i =0;
while( string != '\0')
{
tolower( string );
i++;
}
while(( fgets( phrase, 100, file ) != NULL ) && ( found == false ))
{
if( strstr( phrase, string ) != NULL )
{
found = true;
}
}
if( found == true )
return 1;
else
return 0;
}

 

[lbucko]

Thanks Leibnitz, that worked alright but I'm still a bit puzzeled as how to manage queries with more than one word. can I index the individual words in the string in some way??
I was trying to add another while loop inside the following loop,

while( string[i] != '\0')
    {
       tolower( string[i] );
       i++;
    }

which would check when the query got a whitespace.

while (query[i]!= " ")

Not sure if that makes any sense, would I need to check an array of words??

 

[Leibnitz]

well,it does'nt mather if the "query" got more than one word or whitespaces between each word,the previous code should work for those cases too.


good luck !