STL Input Stream Iterator in c++ 2011

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STL Input Stream Iterator in c++ 2011

Code:

// A simple word counting program #include <iostream> #include <iomanip> #include <string> #include <map> #include <iterator> using std::cout; using std::cin; using std::endl; using std::string; int main() { std::map<string, int> words; // Map to store words and word counts cout << "Enter some text and press Enter followed by Ctrl+Z then Enter to end:" << endl << endl; std::istream_iterator<string> begin(cin); // Stream iterator std::istream_iterator<string> end; // End stream iterator while(begin != end ) // Iterate over words in the stream words[*begin++]++; // Increment and store a word count // Output the words and their counts cout << endl << "Here are the word counts for the text you entered:" << endl; for(auto iter = words.begin() ; iter != words.end() ; ++iter) cout << std::setw(5) << iter->second << " " << iter->first << endl; return 0; }