ex11_18.cpp

//! @Alan
//!
//! Exercise 11.18:
//! Write the type of map_it from the loop on page 430 without using auto or
//! decltype.
//!

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

int main()
{
    std::map<std::string, size_t> word_count;

    //! the orignal codes:
    // auto map_it = word_count.cbegin();

    std::map<std::string, size_t>::const_iterator map_it = word_count.cbegin();
    //! ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    //! the type ex11.18 required.

    // compare the current iterator to the off-the-end iterator
    while (map_it != word_count.cend()) {
        // dereference the iterator to print the element key--value pairs
        std::cout << map_it->first << " occurs " << map_it->second << " times"
                  << std::endl;
        ++map_it; // increment the iterator to denote the next element
    }

    return 0;
}