string_6

#include <iostream> //exercise 6
#include <string> //find the longest word in sentence which ends with '.'
#include <fstream>
using namespace std;

int main()
{
        ifstream in("input.txt");
        ofstream out("output.txt");

        string maximum;
        string s;
        while(in >> s)
        {

            if (s[s.length() - 1] == '.' || s[s.length() - 1] == ',' || s[s.length() - 1] == ':' || s[s.length() - 1] == ';'  || s[s.length() - 1] == '!' || s[s.length() - 1] == '?' || s[s.length() - 1] == '('  || s[s.length() - 1] == ')'  || s[s.length() - 1] == '-')
                    s.erase(s.length() - 1);
            if (s.length() > maximum.length())
                    maximum = s;
        }

        out << maximum;
        in.close();
        out.close();

        return 0;
}