remove (STL Samples)
Montre comment utiliser la fonction de (STL) de modèles Standard de supprimez dans Visual C++.
template<class ForwardIterator, class Type> inline
ForwardIterator remove(
ForwardIterator First,
ForwardIterator Last,
const T& Value
)
Notes
[!REMARQUE]
Les noms de classe/paramètre dans le prototype ne correspondent pas à la version du fichier d'en-tête.Certains ont été modifiés pour améliorer la lisibilité.
L'algorithme de remove supprime tous les éléments qui valeur de correspondance de la plage (First, Last).Il retourne un itérateur égal à Last - n, où n = nombre d'éléments ont supprimé.Les derniers éléments n de la plage ont des valeurs valides mais non spécifiées.La taille du conteneur reste le même.
Exemple
// remove.cpp
// compile with: /EHsc
// Illustrates how to use the remove function.
//
// Functions:
// remove - remove all elements from the sequence that match value.
// begin - Returns an iterator that points to the first element in a
// sequence.
// end - Returns an iterator that points one past the end of a sequence.
//////////////////////////////////////////////////////////////////////
// disable warning C4786: symbol greater than 255 character,
// okay to ignore
#pragma warning(disable: 4786)
#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
using namespace std;
int main()
{
const int VECTOR_SIZE = 8 ;
// Define a template class vector of integers
typedef vector<int > IntVector ;
//Define an iterator for template class vector of integer
typedef IntVector::iterator IntVectorIt ;
IntVector Numbers(VECTOR_SIZE) ; //vector containing numbers
IntVectorIt start, end, it, last;
start = Numbers.begin() ; // location of first
// element of Numbers
end = Numbers.end() ; // one past the location
// last element of Numbers
//Initialize vector Numbers
Numbers[0] = 10 ;
Numbers[1] = 20 ;
Numbers[2] = 10 ;
Numbers[3] = 15 ;
Numbers[4] = 12 ;
Numbers[5] = 7 ;
Numbers[6] = 9 ;
Numbers[7] = 10 ;
cout << "Before calling remove" << endl ;
// print content of Numbers
cout << "Numbers { " ;
for(it = start; it != end; it++)
cout << *it << " " ;
cout << " }\n" << endl ;
// remove all elements from Numbers that match 10
last = remove(start, end, 10) ;
cout << "After calling remove" << endl ;
// print content of Numbers
cout << "Numbers { " ;
for(it = start; it != end; it++)
cout << *it << " " ;
cout << " }\n" << endl ;
//print number of elements removed from Numbers
cout << "Total number of elements removed from Numbers = "
<< end - last << endl ;
//print only the valid elements of Number
cout << "Valid elements of Numbers { " ;
for(it = start; it != last; it++)
cout << *it << " " ;
cout << " }\n" << endl ;
}
Sortie
Before calling remove
Numbers { 10 20 10 15 12 7 9 10 }
After calling remove
Numbers { 20 15 12 7 9 7 9 10 }
Total number of elements removed from Numbers = 3
Valid elements of Numbers { 20 15 12 7 9 }
Configuration requise
Header: <algorithm>