STL Sample for the make_pair Function

ID: Q156899

The information in this article applies to:

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

SUMMARY

The sample code below illustrates how to use the make_pair STL function in Visual C++.

MORE INFORMATION

Required Header

   <utility>

Prototype

   template<class first, class second> inline
         pair<first, second> make_pair(const first& _X, const second& _Y)

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 make_pair function creates a pair structure that contains two data elements of any type.

Sample Code

/////////////////////////////////////////////////////////////////////// 
// Compile options needed: none
// 
// mkpair.cpp: Illustrates how to use the make_pair function.
// 
// Functions: make_pair - creates an object pair containing two data
//                        elements of any type.
// 
// Written by Mark Hagen
// of Microsoft Technical Support
// Copyright (c) 1996 Microsoft Corporation.
// All rights reserved.
/////////////////////////////////////////////////////////////////////// 

/* Compiler options needed: none
*/ 

#include <utility>

/* STL pair data type containing int and float
*/

typedef struct pair<int,float> PAIR_IF;

void main(void)

{

  PAIR_IF pair1=make_pair(18,3.14f);

  cout << pair1.first << "  " << pair1.second << endl;
  pair1.first=10;
  pair1.second=1.0f;
  cout << pair1.first << "  " << pair1.second << endl;

}

Program Output is:

18 3.14 10 1

REFERENCES

Visual C++ Books On Line: Visual C++ Books:C/C++:Standard C++ Library Reference.

Additional query words: STL STLSample make_pair pair

Keywords          : kbcode STLIss 
Version           : WINNT:4.2;
Platform          : NT WINDOWS
Issue type        : kbhowto

Last Reviewed: October 10, 1997