stack::size (STL Samples)

Illustre comment utiliser la fonction de bibliothèque de types (STL) Standard de pile : : taille dans Visual C++.

template<class _TYPE, class _C, class _A>
   size_type stack::size( ) const;

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.

La fonction d' stack::size retourne le nombre d'éléments dans la pile.il est correct d'appeler cette fonction avec une pile vide ; il retourne une valeur de 0.

Exemple

// StackSize.cpp
// compile with: /EHsc
// Illustrates how to use the size function to determine
// the number of elements on the stack.
//
// Functions:
//
//    size :  returns the number of elements in the stack.
//////////////////////////////////////////////////////////////////////

#pragma warning(disable:4786)
#include <stack>
#include <string>
#include <iostream>

using namespace std ;

typedef stack<string> STACK_STRING;

int main()
{
   STACK_STRING stack1;

   // Check the size of an empty stack. Should return 0.
   cout << "stack1.size() equals " << stack1.size() << endl;

   // Add item "Hello" to Stack1.
   cout << "stack1.push('Hello')" << endl;
   stack1.push("Hello");

   // Add item "This is the second element" to Stack1.
   cout << "stack1.push('This is the second element')" << endl;
   stack1.push("This is the second element");

   // Check the size of Stack1. Should return 2.
   cout << "stack1.size() equals " << stack1.size() << endl << endl;

   // Add item "Third element" to Stack1.
   cout << "stack1.push('Third element')" << endl;
   stack1.push("Third element");

   // Check the size of Stack1. Should return 3.
   cout << "stack1.size() equals " << stack1.size() << endl << endl;

   // Pop "Third element".
   cout << "stack1.pop()" << endl;
   stack1.pop();

   // Pop "This is the second element".
   cout << "stack1.pop()" << endl;
   stack1.pop();

   // Check the size of Stack1 again. Should return 1.
   cout << "stack1.size() equals " << stack1.size()  << endl << endl;

   // Pop "Hello".
   cout << "stack1.pop()" << endl;
   stack1.pop();

   // Check the size of Stack1. Should return 0.
   cout << "stack1.size() equals " << stack1.size() << endl;
}

Sortie

stack1.size() equals 0
stack1.push('Hello')
stack1.push('This is the second element')
stack1.size() equals 2

stack1.push('Third element')
stack1.size() equals 3

stack1.pop()
stack1.pop()
stack1.size() equals 1

stack1.pop()
stack1.size() equals 0

Configuration requise

en-tête : <stack>

Voir aussi

Concepts

Exemples de modèles Standard