DaniWeb IT Discussion Community - View Single Post - Determining the number of unique words in a .txt file

Re: Determining the number of unique words in a .txt file

Dec 3rd, 2008

I think you should look at the below code more carefully and must understand the complexity and map datastructure,

if you've any confusion post, I will explain you in more detail then.

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 cpp Syntax (Toggle Plain Text) 
	fstream inFile("C:\\Laiq.txt");
 
	string line;
	std::map<string, int> mapWordCount;
	string word;
	std::string::size_type endWord;
	std::string::size_type startWord;
	while (std::getline (inFile,line)) {				
		startWord = 0;
		while ((endWord = line.find_first_of(" ", startWord))!= line.npos) 
                {				
				word = line.substr (startWord, endWord - startWord);
				mapWordCount[word]++;
				startWord = endWord+1;
		}
	}
	inFile.close();
 
 
	for(map<string,int>::const_iterator iter = mapWordCount.begin(); 
		iter != mapWordCount.end(); ++iter) {
			cout<< "The Frequency of word: "<< iter->first << " is : "<< iter->second <<endl;
	}
	fstream inFile("C:\\Laiq.txt");

	string line;
	std::map<string, int> mapWordCount;
	string word;
	std::string::size_type endWord;
	std::string::size_type startWord;
	while (std::getline (inFile,line)) {				
		startWord = 0;
		while ((endWord = line.find_first_of(" ", startWord))!= line.npos) 
                {				
				word = line.substr (startWord, endWord - startWord);
				mapWordCount[word]++;
				startWord = endWord+1;
		}
	}
	inFile.close();


	for(map<string,int>::const_iterator iter = mapWordCount.begin(); 
		iter != mapWordCount.end(); ++iter) {
			cout<< "The Frequency of word: "<< iter->first << " is : "<< iter->second <<endl;
	}

Last edited by Laiq Ahmed; Dec 3rd, 2008 at 5:06 am. Reason: Changing Code Intendation