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// FILE: author.cxx
// A demonstration program showing how the bag template class is used.
// The program reads some words into bags of Strings, and some numbers into
// a bag of integers. Then a silly story is written using these words.
#include <iostream> // Provides cout and cin
#include <cstdlib> // Provides EXIT_SUCCESS
#include <string> // Provides string class
#include "bag4.h" // Provides the bag template class
using namespace std;
using namespace main_savitch_6A;
const int ITEMS_PER_BAG = 4; // Number of items to put into each bag
const int MANY_SENTENCES = 3; // Number of sentences in the silly story
// PROTOTYPE for a function used by this demonstration program
template <class Item, class SizeType, class MessageType>
void get_items(bag<Item>& collection, SizeType n, MessageType description)
// Postcondition: The string description has been written as a prompt to the
// screen. Then n items have been read from cin and added to the collection.
// Library facilities used: iostream, bag4.h
{
Item user_input; // An item typed by the program's user
SizeType i;
cout << "Please type " << n << " " << description;
cout << ", separated by spaces.\n";
cout << "Press the <return> key after the final entry:\n";
for (i = 1; i <= n; ++i)
{
cin >> user_input;
collection.insert(user_input);
}
cout << endl;
}
int main( )
{
bag<string> adjectives; // Contains adjectives typed by user
bag<int> ages; // Contains ages in the teens typed by user
bag<string> names; // Contains names typed by user
int line_number; // Number of the output line
// Fill the three bags with items typed by the program's user.
cout << "Help me write a story.\n";
get_items(adjectives, ITEMS_PER_BAG, "adjectives that describe a mood");
get_items(ages, ITEMS_PER_BAG, "integers in the teens");
get_items(names, ITEMS_PER_BAG, "first names");
cout << "Thank you for your kind assistance.\n\n";
// Use the items to write a silly story.
cout << "LIFE\n";
cout << "by A. Computer\n";
for (line_number = 1; line_number <= MANY_SENTENCES; ++line_number)
cout << names.grab( ) << " was only "
<< ages.grab( ) << " years old, but he/she was "
<< adjectives.grab( ) << ".\n";
cout << "Life is " << adjectives.grab( ) << ".\n";
cout << "The (" << adjectives.grab( ) << ") end\n";
return EXIT_SUCCESS;
}
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