STL Sample for the set::max_size Function

Last reviewed: October 9, 1997
Article ID: Q158577

The information in this article applies to:

The Standard C++ Library included with: - Microsoft Visual C++, 32-bit Edition, version 4.2

SUMMARY

The following sample code illustrates how to use the set::max_size STL function in Visual C++.

MORE INFORMATION

Required Header

   <set>

Prototype

   template<class _K, class _Pr, class _A>
   class set {
   public:
   // Function 1:
      size_type max_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 max_size function is used to determine the maximum number of elements the controlled sequence can contain.

Sample Code

//////////////////////////////////////////////////////////////////////
//
// Compile options needed: -GX
//
// SetMax_size.cpp:
//      Illustrates how to use the max_size function to determine how
//      many elements the controlled sequence can contain.
//
// Functions:
//
//    max_size     Returns the maximum number of elements the controlled
//                 sequence can contain.
//
// Written by Derek Jamison
// of Microsoft Technical Support,
// Copyright (c) 1996 Microsoft Corporation. All rights reserved.
//////////////////////////////////////////////////////////////////////

#pragma warning(disable:4786)

#include <set>
#include <iostream>
#include <assert.h>

typedef set<int,less<int>,allocator<int> > SET_INT;

void main() {
  SET_INT s1;

  cout << "s1.max_size() returned ";
  cout << s1.max_size() << endl;  // 1073741823 [value may vary]
  for (int x=0;(x<1000 && x<s1.max_size());x++)
   assert(s1.insert(x).second);
  cout << "s1.size() returned ";
  cout << s1.size() << endl; // 1000

}

Program Output

s1.max_size() returned 1073741823 s1.size() returned 1000

REFERENCES

Visual C++ Books Online: Visual C++ Books; C/C++; Standard C++ Library Reference

Additional query words: STL STLSample max_size string
Keywords : STLIss kbcode
Version : WINNT:4.2;
Platform : NT WINDOWS
Issue type : kbhowto

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Last reviewed: October 9, 1997
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