Article: Q158039
Product(s): Microsoft C Compiler
Version(s): 4.2,5.0,6.0
Operating System(s):
Keyword(s): kbcode kbVC420 kbVC500 kbVC600 kbDSupport
Last Modified: 17-APR-2002
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The information in this article applies to:
- The Standard C++ Library, used with:
- Microsoft Visual C++, 32-bit Enterprise Edition, versions 4.2, 5.0, 6.0
- Microsoft Visual C++, 32-bit Professional Edition, versions 4.2, 5.0, 6.0
- Microsoft Visual C++, 32-bit Learning Edition, version 6.0
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SUMMARY
=======
The sample code below illustrates how to use the stack::size STL function in
Visual C++.
MORE INFORMATION
================
Required Header
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<stack>
Prototype
---------
template<class _TYPE, class _C, class _A>
size_type stack::size() const;
NOTE: The class/parameter names in the prototype may not match the version in the
header file. Some have been modified to improve readability.
Description
-----------
The stack::size function returns the number of elements in the stack. It is okay
to call this function with an empty stack; it will return a value of 0.
Sample Code
-----------
//////////////////////////////////////////////////////////////////////
//
// Compile options needed: /GX
//
// StackSize.cpp : 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.
//
// Written by Derek Jamison
// of Microsoft Product Support Services,
// Copyright (c) 1996 Microsoft Corporation. All rights reserved.
//////////////////////////////////////////////////////////////////////
#pragma warning(disable:4786)
#include <stack>
#include <string>
#include <iostream>
using namespace std;
#if _MSC_VER > 1020 // if VC++ version is > 4.2
using namespace std; // std c++ libs implemented in std
#endif
typedef stack<string, deque<string, allocator<string> >,
allocator<string> > STACK_STRING;
void 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 << endl;
}
Program Output is:
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
REFERENCES
==========
Visual C++ Books On Line: Visual C++ Books:C/C++:Standard C++ Library Reference.
Additional query words: STL STLSample size
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Keywords : kbcode kbVC420 kbVC500 kbVC600 kbDSupport
Technology : kbVCsearch kbAudDeveloper kbVCLibrary
Version : :4.2,5.0,6.0
Issue type : kbinfo
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