#include <algorithm>

#include <iostream>

#include <string>

#include <ctype.h> // provides isalnum()

using namespace std;



// function object class used in call to count_if

class AlphaFinder

{

	public:

		bool operator() (char c) { return isalnum(c);	}

};



void main()

{

	const int NO_LETTERS = 26;

	string s;

	cout << "Please enter a string of characters:" << endl ;

	getline(cin,s);

	for (int i = 0; i < NO_LETTERS; i++)

	{	cout << "# of " << static_cast<char>('a'+i) << "'s:" << count(s.begin(), s.end(), 'a'+i) << "\t";	}

	

	cout << endl << "No of alphanumeric characters: " << count_if(s.begin(), s.end(), AlphaFinder()) << endl;

}