set::swap, set::begin, y set::end
Muestra cómo utilizar las funciones de la biblioteca estándar de la plantilla de conjunto:: intercambio,conjunto:: inicio, and(STL)conjunto:: final en Visual C++.
template<class _K, class _Pr, class _A>
class set
{
public:
// Function 1:
void swap(_Myt& _X);
// Function 2:
friend void swap(_Myt& _X, _Myt& _Y);
// Function 3:
const_iterator begin( ) const;
// Function 4:
const_iterator end( ) const;
}
Comentarios
[!NOTA]
La clase y los nombres de parámetro en el prototipo no coincide con la versión del archivo de encabezado.Algunos se han modificado para mejorar la legibilidad.
La función de swap cambia las dos secuencias controladas.La función de inicio devuelve un iterador bidireccional que apunte al primer elemento de la secuencia.La función de final devuelve un iterador bidireccional que señala simplemente más allá del final de la secuencia.
Ejemplo
// SetSwapBeginEnd.cpp
// compile with: /EHsc
//
// Illustrates how to use the swap function to exchange the two
// controlled sequences. It also illustrates how to use the
// begin function to get a bidirectional iterator that points at
// the first element of the controlled sequence. Finally, it
// illustrates how to use the end function to get a bidirectional
// iterator that points just beyond the end of the controlled
// sequence.
//
// Functions:
//
// swap Exchanges the two controlled sequences.
// begin Returns a bidirectional iterator that points at the
// first element of the controlled sequence.
// end Returns a bidirectional iterator that points just
// beyond the end of the controlled sequence.
//
//////////////////////////////////////////////////////////////////////
#pragma warning(disable:4786)
#include <set>
#include <iostream>
using namespace std ;
typedef set<int> SET_INT;
int main() {
SET_INT s1;
SET_INT s2;
SET_INT::iterator i;
cout << "s1.insert(5)" << endl;
s1.insert(5);
cout << "s1.insert(10)" << endl;
s1.insert(10);
cout << "s1.insert(15)" << endl;
s1.insert(15);
cout << "s2.insert(2)" << endl;
s2.insert(2);
cout << "s2.insert(4)" << endl;
s2.insert(4);
cout << "swap(s1,s2)" << endl;
swap(s1,s2);
// Displays: 2,4
for (i=s1.begin();i!=s1.end();i++)
cout << "s1 has " << *i << " in its set." << endl;
// Displays: 5,10,15
for (i=s2.begin();i!=s2.end();i++)
cout << "s2 has " << *i << " in its set." << endl;
cout << "s1.swap(s2)" << endl;
s1.swap(s2);
// Displays: 5,10,15
for (i=s1.begin();i!=s1.end();i++)
cout << "s1 has " << *i << " in its set." << endl;
// Displays: 2,4
for (i=s2.begin();i!=s2.end();i++)
cout << "s2 has " << *i << " in its set." << endl;
}
Output
s1.insert(5)
s1.insert(10)
s1.insert(15)
s2.insert(2)
s2.insert(4)
swap(s1,s2)
s1 has 2 in its set.
s1 has 4 in its set.
s2 has 5 in its set.
s2 has 10 in its set.
s2 has 15 in its set.
s1.swap(s2)
s1 has 5 in its set.
s1 has 10 in its set.
s1 has 15 in its set.
s2 has 2 in its set.
s2 has 4 in its set.
Requisitos
encabezado: <conjunto>