vector::push_back et vector::pop_back
Explique comment utiliser les fonctions de la bibliothèque de modèles Standard de vecteur : : push_back et (STL) de vecteur : : pop_back dans Visual C++.
template<class _TYPE, class _A>
void vector::push_back(
const _TYPE& X
);
template<class _TYPE, class _A>
void vector::pop_back();
Notes
[!REMARQUE]
Les noms de classes/paramètre dans le prototype ne correspondent pas à la version du fichier d'en-tête.certains ont été modifiés pour améliorer la lisibilité.
L'exemple déclare un vecteur vide d'entiers.Il ajoute trois entiers au vecteur, puis supprime un.Enfin, elle génère les éléments restants dans le vecteur.
Exemple
// 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 ;
}
Configuration requise
en-tête : <vector>