ex11_14.cpp

//
// @Yue Wang
//
// Exercise 11.14:
// Extend the map of children to their family name that you wrote for the
// exercises in § 11.2.1 (p. 424) by having the vector store a pair that
// holds a child’s name and birthday.
//
// Exercise 11.7:
// Define a map for which the key is the family’s last name and
// the value is a vector of the children’s names. Write code to
// add new families and to add new children to an existing family.
//

#include <iostream>
#include <map>
#include <string>
#include <vector>

using std::ostream;
using std::cout;
using std::cin;
using std::endl;
using std::string;
using std::make_pair;
using std::pair;
using std::vector;
using std::map;

class Families
{
public:
    using Child     = pair<string, string>;
    using Children  = vector<Child>;
    using Data      = map<string, Children>;

    auto add(string const& last_name, string const& first_name, string birthday)
    {
        auto child = make_pair(first_name, birthday);
        _data[last_name].push_back(child);
    }

    auto print() const
    {
        for (auto const& pair : _data)
        {
            cout << pair.first << ":\n" ;
            for (auto const& child : pair.second)
                cout << child.first << " " << child.second << endl;
            cout << endl;
        }
    }

private:
    Data _data;
};

int main()
{
    Families families;
    auto msg = "Please enter last name, first name and birthday:\n";
    for (string l, f, b; cout << msg, cin >> l >> f >> b; families.add(l, f, b));
    families.print();

    return 0;
}