Use not2() to remove all characters that are not equal to H : not1 « STL Algorithms Helper « C++ Tutorial

1. C++ Tutorial
2. STL Algorithms Helper
3. not1

#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>

using namespace std;

int main(){
  vector<char> v;

  for(int i=0; i < 26; i++) 
     v.push_back('A'+i);

  vector<char>::iterator res_end;
  res_end = remove_if(v.begin(), v.end(),not1(bind2nd(equal_to<char>(), 'H')));

  return 0;
}