#include <algorithm>

#include <numeric> // provides accumulate algorithm

#include <vector>

#include <iterator>

#include <iostream>

#include <stdlib.h>

#include <time.h>

#include <ctype.h>	// provides isalpha

using namespace std;



class CharChecker

{

	public:

		CharChecker(): alphas(0), digits(0), lowercase(0) {}

		void operator() (char c) { if (isalpha(c)) { alphas++; return;}	

											if (isdigit(c)) {	digits++; return;}

											if (islower(c)) { lowercase++; return;}	}

		// no need to encapsulate private data since objects will be short-lived

		int alphas, digits, lowercase;

};



void main()

{

	vector<char> v(30);



	srand(time(0));	

	generate(v.begin(), v.end(), rand);

	cout << "Random sequence of characters: " << endl;

	copy(v.begin(), v.end(), ostream_iterator<char>(cout));

	

	CharChecker cc =	for_each(v.begin(), v.end(), CharChecker());

	cout << endl << "Number of letters in above sequence: " << cc.alphas 

		  << endl << "Number of digits in above sequence: " << cc.digits

		  << endl << "Number of lowercase letters: " << cc.lowercase << endl;

	

	vector<unsigned int> v2(30);

	generate(v2.begin(), v2.end(), rand);

	cout << "Random sequence of integers: " << endl;

	copy(v2.begin(), v2.end(), ostream_iterator<int>(cout, " "));

	cout << endl << "Sum of integers: " << accumulate(v2.begin(), v2.end(), 0) << endl;

}