stack::size (STL Samples)

Ilustra como usar o stack::size função de biblioteca STL (Standard Template) no Visual C++.

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

Comentários

Observação
Nomes de classe/parâmetro o protótipo não coincidem com a versão no arquivo de cabeçalho.Alguns foram modificados para melhorar a legibilidade.

O stack::size função retorna o número de elementos da pilha.Tudo bem chamar essa função com uma pilha vazia; ela retornará um valor de 0.

Exemplo

// 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;
}

Saída

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

Requisitos

Cabeçalho: <stack>

Consulte também

Conceitos

Exemplos de biblioteca de modelo padrão