map.cpp

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#include <iostream>    // for cout
#include <map>         // for map
#include <string>      // for string
#include <utility>     // for pair
 
#include <examples.h>
 
 
typedef std::map<std::string, int, std::less<std::string>,
                 std::allocator<std::pair<const std::string, int> > >
months_type;
 
 
// Print out a map.
inline std::ostream&
operator<< (std::ostream &out, const months_type &m)
{
    for (months_type::const_iterator it = m.begin (); it != m.end (); ++it)
        std::cout << (*it).first << " has " << (*it).second << " days\n";
 
    return out;
}
 
 
int main ()
{
    // Create a map of months and the number of days in the month.
    months_type months;
 
    typedef months_type::value_type value_type;
 
    // Put the months in the multimap.
    months.insert (value_type (std::string ("January"),   31));
    months.insert (value_type (std::string ("Febuary"),   28));
    months.insert (value_type (std::string ("Febuary"),   29));
    months.insert (value_type (std::string ("March"),     31));
    months.insert (value_type (std::string ("April"),     30));
    months.insert (value_type (std::string ("May"),       31));
    months.insert (value_type (std::string ("June"),      30));
    months.insert (value_type (std::string ("July"),      31));
    months.insert (value_type (std::string ("August"),    31));
    months.insert (value_type (std::string ("September"), 30));
    months.insert (value_type (std::string ("October"),   31));
    months.insert (value_type (std::string ("November"),  30));
    months.insert (value_type (std::string ("December"),  31));
 
    // Print out the months.  Second Febuary is not present.
    std::cout << months << std::endl;
 
    // Find the Number of days in June.
    months_type::iterator p = months.find (std::string ("June"));
 
    // Print out the number of days in June.
    if (p != months.end ())
        std::cout << std::endl << (*p).first << " has "
                  << (*p).second << " days\n";
  
    return 0;
}