vector::push_back y vector::pop_back
Muestra cómo utilizar vector:: push_back y las funciones de la biblioteca estándar de la plantilla (STL) de vector:: pop_back en Visual C++.
template<class _TYPE, class _A>
void vector::push_back(
const _TYPE& X
);
template<class _TYPE, class _A>
void vector::pop_back();
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.
el ejemplo declara un vector vacío de enteros.Agrega tres enteros el vector, y se elimina uno.finalmente, genera los elementos restantes en el vector.
Ejemplo
// Pushpop.cpp
// compile with: /EHsc
// Illustrates how to use the push and pop member
// functions of the vector container.
//
// Functions:
//
// vector::push_back - Appends (inserts) an element to the end of a
// vector, allocating memory for it if necessary.
//
// vector::pop_back - Erases the last element of the vector.
//
// vector::begin - Returns an iterator to start traversal of the vector.
//
// vector::end - Returns an iterator for the last element of the vector.
//
// vector::iterator - Traverses the vector.
//
//////////////////////////////////////////////////////////////////////
// The debugger can't handle symbols more than 255 characters long.
// STL often creates symbols longer than that.
// When symbols are longer than 255 characters, the warning is disabled.
#pragma warning(disable:4786)
#include <iostream>
#include <vector>
using namespace std ;
typedef vector<int> INTVECTOR;
int main()
{
// Dynamically allocated vector begins with 0 elements.
INTVECTOR theVector;
// Iterator is used to loop through the vector.
INTVECTOR::iterator theIterator;
// Add one element to the end of the vector, an int with the value 42.
// Allocate memory if necessary.
theVector.push_back(42) ;
// Add two more elements to the end of the vector.
// theVector will contain [ 42, 1, 109 ].
theVector.push_back(1) ;
theVector.push_back(109) ;
// Erase last element in vector.
theVector.pop_back();
// Print contents of theVector. Shows [ 42, 1 ]
cout << "theVector [ " ;
for (theIterator = theVector.begin(); theIterator != theVector.end();
theIterator++)
{
cout << *theIterator;
if (theIterator != theVector.end()-1) cout << ", ";
}
cout << " ]" << endl ;
}
Requisitos
encabezado: <vector>