mirror of https://github.com/davisking/dlib.git
79 lines
2.1 KiB
C++
Executable File
79 lines
2.1 KiB
C++
Executable File
// The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt
|
|
/*
|
|
|
|
This is an example illustrating the use of the queue component (and
|
|
to some degree the generial idea behind most of the other container
|
|
classes) from the dlib C++ Library.
|
|
|
|
It loads a queue with 20 random numbers. Then it uses the enumerable
|
|
interface to print them all to the screen. Then it sorts the numbers and
|
|
prints them to the screen.
|
|
*/
|
|
|
|
|
|
|
|
|
|
#include "dlib/queue.h"
|
|
#include <iostream>
|
|
#include <iomanip>
|
|
#include <ctime>
|
|
#include <cstdlib>
|
|
|
|
|
|
// I'm picking the version of the queue that is kernel_2a extended by
|
|
// the queue sorting extension. This is just a normal queue but with the
|
|
// added member function sort() which sorts the queue.
|
|
typedef dlib::queue<int>::sort_1b_c queue_of_int;
|
|
|
|
|
|
using namespace std;
|
|
using namespace dlib;
|
|
|
|
|
|
int main()
|
|
{
|
|
queue_of_int q;
|
|
|
|
// initialize rand()
|
|
srand(time(0));
|
|
|
|
for (int i = 0; i < 20; ++i)
|
|
{
|
|
int a = rand()&0xFF;
|
|
|
|
// note that adding a to the queue "consumes" the value of a because
|
|
// all container classes move values around by swapping them rather
|
|
// than copying them. So a is swapped into the queue which results
|
|
// in a having an initial value for its type (for int types that value
|
|
// is just some undefined value. )
|
|
q.enqueue(a);
|
|
|
|
}
|
|
|
|
|
|
cout << "The contents of the queue are:\n";
|
|
while (q.move_next())
|
|
cout << q.element() << " ";
|
|
|
|
cout << "\n\nNow we sort the queue and its contents are:\n";
|
|
q.sort(); // note that we don't have to call q.reset() to put the enumerator
|
|
// back at the start of the queue because calling sort() does
|
|
// that automatically for us. (In general, modifying a container
|
|
// will reset the enumerator).
|
|
while (q.move_next())
|
|
cout << q.element() << " ";
|
|
|
|
|
|
cout << "\n\nNow we remove the numbers from the queue:\n";
|
|
while (q.size() > 0)
|
|
{
|
|
int a;
|
|
q.dequeue(a);
|
|
cout << a << " ";
|
|
}
|
|
|
|
|
|
cout << endl;
|
|
}
|
|
|