Search specific pair/triple word in a paragraphs

[MacGregor]

Hi you all, i have a function that searches paragraphs in a file and compares whether within that particular paragraph, there is word or pair/triple-word. Up to here works well if you pass for example "John", the problem I have is when i give in console, for example "John Doe" or "John Doe Doll". Always find only "John" I whant to find pairs/triples or more words, always taking care the case-sensitive, since it is not the same "John Doe Doll" that "john doe doll". Must be the exact search.. Then, the function i have:

string findParagraphs( istream &in ) {
	string searchWord;
	string result, line, resultMATCH;
	string::size_type position, found;
	const string LF("\n");
	const string CR("\r");
	const string DOT(".");
	const string SPACE(" ");
	const string NUL("\0");
	string whitespaces ("\r\n\v\f\t");
	bool IsParagraph;
	int numline=0, paragraph=0, paragraphMATCH=0;
	unsigned int place;
	
	searchWord = wordsToFind(); // Here i pass the words

	while (getline( in, line )) {
			IsParagraph = false;
			if (line.empty()) {
				line.clear();
			}
			found=line.find_last_not_of(whitespaces);
			if (found!=string::npos)
				line.erase(found+1);
			else {
				line.clear(); 
			}
				
			position = line.find_last_of(DOT);
			//cout << "DOT found in position " << position << endl; // Comprobation
			if ((position != string::npos && line.substr(position+1)==SPACE && line.substr(position+2)==NUL) ||
				(position != string::npos && line.substr(position+1)==SPACE && line.substr(position+2)==CR)) {
				
				paragraph++;
				
				IsParagraph = true;
			} 
				
			if (IsParagraph){
				// Store the Paragraph in new lines "LF"
				result += line +LF;
				place = result.find(searchWord); // HERE THE PROBLEM!!!...
				if (place != string::npos) {
					paragraphMATCH++;
					//Store only the paragraphs that match the search words 
					resultMATCH += result; 
				}
				// Clean result to avoid duplicates
				result.clear();
			} else {
                                // Concatenate lines that have no end of paragraph
				result += line +SPACE;
				result.erase( result.length() -1 );
			}
		numline++;
	}
		cout << " ===================================== " << endl;
		cout << "+Total number of lines analyzed: " << numline << endl;
		cout << "+Total number of paragraphs: " << paragraph << endl;
		cout << "+Paragraphs that contain the search: " << paragraphMATCH << endl;
		cout << " ===================================== " << endl;
	return resultMATCH;
}

The function plays the role of finding paragraphs but takes only the 1st word entered "John"..

For example:
John - find in 122 paragraphs
John Doe - find in 122 paragraphs
John Doe Doll - find in 122 paragraphs
Doe Doll - find in 233 paragraphs

But the words "John Doe Doll" together, are in 80 paragraphs. :/

Apreciate any help... Thanks in advance!!!....

Mac

[sandeepdas]

Try to use strstr instead of find and others...

[MacGregor]

Hi sandeepdas, thanks but, with the strstr have the same problem

if (strstr(result.c_str(), searchWord.c_str())) {
	paragraphMATCH++;
	//Store only the paragraphs that match the search words
	resultMATCH += result; 
}
			

"John" - find in 122 paragraphs
"John Doe" - find in 122 paragraphs
"John Doe Doll" - find in 122 paragraphs
"Doe Doll" - find in 233 paragraphs

Dont search pairs/triple words. Any sugestion?

Cheers!!...

Mac

[JLBorges]

> The function plays the role of finding paragraphs but takes only the 1st word entered "John"..

How have you implemented wordsToFind()?

Like this: std::string str ; std::cin >> str ;

Or like this: std::string str ; std::getline( std::cin >> std::ws, str ) ;?

[MacGregor]

Hi JLBorges.. The function wordsToFind() is

string wordsToFind() {
	string search;
	cout<< "Words to find: ";
	cin >> search;
return search;
}

[JLBorges]

Change cin >> search; to getline( cin >> ws, search );

Your program will then make an exact search (char by char including spaces) for a phrase.
For example John Doe Doll would match John Doe Doll, but not John.Doe.Doll or John Doe, Doll.

[MacGregor]

Nice!!.. thanks JLBorges!!.. this solved the problem and work with both:

if (strstr(result.c_str(), searchWord.c_str())) {
	paragraphMATCH++;
	//Store only the paragraphs that match the search words
	resultMATCH += result; 
}

place = result.find(searchWord); 
if (place != string::npos) {
        paragraphMATCH++;
	//Store only the paragraphs that match the search words 
	resultMATCH += result; 
}

What you say is safer?

[JLBorges]

> What you say is safer?

Either is safe. Since you are programming in C++, with std::string, stick to std::string::find. Though you do not need either its flexibility or its robustness in this particular case.

[MacGregor]

Thanks JLBorges!!!... A really good and fast solution....

Cheers!!!!!...

Mac