ex9_47_2.cpp

//
//  ex9_47_2.cpp
//  Exercise 9.47
//
//  Created by pezy on 12/5/14.
//  Copyright (c) 2014 pezy. All rights reserved.
//
//  @Brief  Write a program that finds each numeric character
//          and then each alphabetic character in the string "ab2c3d7R4E6".
//          Write two versions of the program. The first should use find_first_of,
//          and the second find_first_not_of.
//  @Version find_first_not_of

#include <string>
#include <iostream>

using std::string; using std::cout; using std::endl;

int main()
{
    string numbers{"123456789"};
    string alphabet{"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"};
    string str{"ab2c3d7R4E6"};
    
    cout << "numeric characters: ";
    for (string::size_type pos = 0; (pos = str.find_first_not_of(alphabet, pos)) != string::npos; ++pos)
        cout << str[pos] << " ";
    cout << "\nalphabetic characters: ";
    for (string::size_type pos = 0; (pos = str.find_first_not_of(numbers, pos)) != string::npos; ++pos)
        cout << str[pos] << " ";
    cout << endl;
    
    return 0;
}