#include <algorithm>
#include <set>
#include <iostream.h>
int main()
{
//Initialize some sets
int a1[10] = {1,2,3,4,5,6,7,8,9,10};
int a2[6] = {2,4,6,8,10,12};
set<int, less<int> > all(a1, a1+10), even(a2, a2+6),
odd;
//Create an insert_iterator for odd
insert_iterator<set<int, less<int> > >
odd_ins(odd, odd.begin());
//Demonstrate set_difference
cout << "The result of:" << endl << "{";
copy(all.begin(),all.end(),
ostream_iterator<int>(cout," "));
cout << "} - {";
copy(even.begin(),even.end(),
ostream_iterator<int>(cout," "));
cout << "} =" << endl << "{";
set_difference(all.begin(), all.end(),
even.begin(), even.end(), odd_ins);
copy(odd.begin(),odd.end(),
ostream_iterator<int>(cout," "));
cout << "}" << endl << endl;
return 0;
}
Output :
The result of:
{1 2 3 4 5 6 7 8 9 10 } - {2 4 6 8 10 12 } =
{1 3 5 7 9 }
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