QBasic & Borland Pascal & C/Delphi5.iso/C/BC_502/STDLIB.PAK/SET_DIFF.CPP

C/C++ Source or Header | 1997-05-06 | 880 b | 34 lines

 #include <algorithm>
 #include <set>

 using namespace std;

 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+0, a1+10), even(a2+0, 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;
 }