test.cpp

#include <set>
#include <vector>
#include <map>
#include <sstream>
#include <fstream>
#include <iostream>
#include <utility>
using namespace std;
int main(int argc, char *argv[])
{
    // Sets
    set <string> strset;
    strset.insert("bug");
    strset.insert("horse");
    strset.insert("horse");
    set<string>::iterator findit;
    findit = strset.find("horse");
    cout << "Found horse "<< *findit<<endl;
    for (set<string>::iterator it=strset.begin(); it!=strset.end(); ++it)
        cout << ' ' << *it;
    cout << endl;
    
    vector<string> tokens;
    set <string> unique;
    string next_line;  // Each data line
    ifstream in(argv[1]);
    while (getline(in, next_line)) {
        istringstream iss(next_line);
        string token;
        while (iss >> token) {
            string nopunct = "";
            for(auto &c : token) { // Remove Punctuation      
                if (isalpha(c)) {
                    nopunct +=c;       
                }
            }
	        tokens.push_back(nopunct);
		    unique.insert(nopunct);
		    // cout << token<<endl;
	    }
    }
    cout << "Number of words "<<tokens.size()<<endl;
    cout << "Number of unique words "<<unique.size()<<endl;
    for (set<string>::iterator it=unique.begin(); it!=unique.end(); ++it)
        cout << ' ' << *it;
    cout << endl;
    
    // pairs
    pair <string,int> mypair;
    mypair.first = "Hello";
    mypair.second = 8;
    cout << mypair.first<<" "<<mypair.second<<endl;
    set <pair <string, int>> pairset;
    pairset.insert(mypair);
    set<pair <string, int>>::iterator findpair;
    findpair = pairset.find(mypair);
    cout << "found First "<<findpair->first<<" second "<<findpair->second<<endl;
    
    // maps
    map <string, int> wordcount;
    wordcount["foo"] = 5;
    cout << "wordcount for foo "<<wordcount["foo"]<<endl;
    wordcount.insert(mypair);
    cout << "wordcount for Hello "<<wordcount["Hello"]<<endl;
    wordcount.clear();
    for(auto s:tokens) {
        wordcount[s]++;
    }
    for (map<string,int>::iterator it=wordcount.begin(); it!=wordcount.end(); ++it)
        cout << it->first<<' ' << it->second<<endl;
    cout << endl;
}