make_pair (STL Sample)

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

Required Header:
<utility>

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 do 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.
///////////////////////////////////////////////////////////////////////

/* Compiler options needed: none
*/

#include <utility>
#include <iostream>

using namespace std;


/* 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