includes, set_difference, set_intersection, set_symmetric_difference and set_union. : set_difference « STL Algorithms Merge

includes, set_difference, set_intersection, set_symmetric_difference and set_union. : set_difference « STL Algorithms Merge « C++ Tutorial

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C++ Tutorial » STL Algorithms Merge » set_difference

28.4.3.includes, set_difference, set_intersection, set_symmetric_difference and set_union.

#include <iostream>

#include <algorithm>



using namespace std;



int main()

{

   const int SIZE1 = 10, SIZE2 = 5, SIZE3 = 20;

   int a1[ SIZE1 ] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

   int a2[ SIZE2 ] = { 4, 5, 6, 7, 8 };

   int a3[ SIZE2 ] = { 4, 5, 6, 11, 15 };



   if ( includes( a1, a1 + SIZE1, a2, a2 + SIZE2 ) )

      cout << "\na1 includes a2";

   else

      cout << "\na1 does not include a2";

      

   if ( includes( a1, a1 + SIZE1, a3, a3 + SIZE2 ) )

      cout << "\na1 includes a3";

   else

      cout << "\na1 does not include a3";



   int difference[ SIZE1 ];

   int *ptr = set_difference( a1, a1 + SIZE1, a2, a2 + SIZE2, difference );



   int intersection[ SIZE1 ];

   ptr = set_intersection( a1, a1 + SIZE1, a2, a2 + SIZE2, intersection );



   int symmetric_difference[ SIZE1 ];

   ptr = set_symmetric_difference( a1, a1 + SIZE1,a2, a2 + SIZE2, symmetric_difference );



   int unionSet[ SIZE3 ];

   ptr = set_union( a1, a1 + SIZE1, a3, a3 + SIZE2, unionSet );

   return 0;

}

28.4.set_difference
	28.4.1.	Determine elements in one set but not in another set
	28.4.2.	Determine elements of first range without elements of second range by using set_difference()
	28.4.3.	includes, set_difference, set_intersection, set_symmetric_difference and set_union.

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