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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4. #include <iterator>
  5.  
  6. bool bp (int left, int right) { return ( left + right == 2); }
  7.  
  8. template<class ForwardIt, class BinaryPredicate>
  9. ForwardIt removeif(ForwardIt first, ForwardIt last, BinaryPredicate p) {
  10.  
  11.     ForwardIt result = first;
  12.     while ( first != last - 1) {
  13.         if ( !p( *first, *( first + 1))) {
  14.             *result = *first;
  15.             ++result;
  16.         }
  17.         if( first == last - 1) return result;
  18.         ++first;
  19.     }
  20.     return result;
  21. }
  22.  
  23. /*
  24.  * 
  25.  */
  26. int main(int argc, char** argv) {
  27.  
  28.     int a[] = { 0, 2, 1, 3, 0, 2, 3, 2, 0, 3, 8};
  29.     std::vector<int> v( a, a + 11);
  30.     std::copy( v.begin(), v.end(), std::ostream_iterator<int>( std::cout, ","));
  31.     std::cout << std::endl;
  32.     std::vector<int>::iterator it = removeif( v.begin(), v.end(), bp);
  33.     std::copy( v.begin(), v.end(), std::ostream_iterator<int>( std::cout, ","));
  34.     v.erase( it, v.end()); std::cout << std::endl;
  35.     std::copy( v.begin(), v.end(), std::ostream_iterator<int>( std::cout, ","));
  36.     return 0;
  37. }
Success #stdin #stdout 0s 3428KB
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stdin
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Standard input is empty
stdout
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0,2,1,3,0,2,3,2,0,3,8,
2,1,3,2,3,0,3,2,0,3,8,
2,1,3,2,3,0,3,
https://ideone.com/8BcmJq
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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