Removing values from a sequence with algorithms remove_copy_if. - C++ STL Algorithm

Description

Removing values from a sequence with algorithms remove_copy_if.

Demo Code

#include <iostream> 
#include <algorithm> // algorithm definitions 
#include <vector> // vector class-template definition 
#include <iterator> // ostream_iterator 
using namespace std;

bool greater9(int); // prototype 

int main()//ww  w  .  j  a va 2s  .  c  o  m
{
  const int SIZE = 10;
  int a[SIZE] = { 10, 2, 10, 4, 16, 6, 14, 8, 12, 10 };
  ostream_iterator< int > output(cout, " ");
  vector< int > v(a, a + SIZE); // copy of a 
  vector< int > v4(a, a + SIZE); // copy of a 
  vector< int > c2(a, a + SIZE); // copy of a 
  vector< int >::iterator newLastElement;

  cout << "Vector v before removing all 10s:\n           ";
  copy(v.begin(), v.end(), output);

  // copy elements from v4 to c2, removing elements greater 
  // than 9 in the process 
  remove_copy_if(v4.begin(), v4.end(), c2.begin(), greater9);
  cout << "\nVector c2 after removing all elements"
    << "\ngreater than 9 from v4:\n          ";
  copy(c2.begin(), c2.end(), output);
  cout << endl;
}

// determine whether argument is greater than 9 
bool greater9(int x)
{
  return x > 9;
}

Result

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Related Tutorials

• Remove() and replace() elements in vector
• Removing values from a sequence with algorithms remove_copy
• Filtering Values Outside a Given Range using the remove_copy_if function found in the <algorithm>
• Removing values from a sequence with algorithms remove_if
• Replacing values from a sequence using algorithms replace