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  1. //: C21:Compose2.cpp
  2. // From Thinking in C++, 2nd Edition
  3. // Available at http://www.BruceEckel.com
  4. // (c) Bruce Eckel 1999
  5. // Copyright notice in Copyright.txt
  6. // Using the SGI STL compose2() function
  7. #include "copy_if.h"
  8. #include <algorithm>
  9. #include <vector>
  10. #include <iostream>
  11. #include <functional>
  12. #include <cstdlib>
  13. #include <ctime>
  14. using namespace std;
  15.  
  16. int main() {
  17.   srand(time(0));
  18.   vector<int> v(100);
  19.   generate(v.begin(), v.end(), rand);
  20.   transform(v.begin(), v.end(), v.begin(),
  21.     bind2nd(divides<int>(), RAND_MAX/100));
  22.   vector<int> r;
  23.   copy_if(v.begin(), v.end(), back_inserter(r),
  24.     compose2(logical_and<bool>(),
  25.       bind2nd(greater_equal<int>(), 30),
  26.       bind2nd(less_equal<int>(), 40)));
  27.   sort(r.begin(), r.end());
  28.   copy(r.begin(), r.end(),
  29.     ostream_iterator<int>(cout, " "));
  30.   cout << endl;
  31. } ///:~
  32.