find all template function : Function Template « Function « C++

find all template function

#include <vector>
#include <iostream>
#include <functional>
#include <algorithm>
using namespace std;

template <typename InputIterator, typename Predicate>
vector<InputIterator> find_all(InputIterator first, InputIterator last, Predicate pred)
  vector<InputIterator> res;

  while (true) {
    first = find_if(first, last, pred);
    if (first == last) {
  return (res);

int main(int argc, char** argv){

  int arr[] = {3, 4, 5, 4, 5, 6, 5, 8};
  vector<int*> all = find_all(arr, arr + 8, bind2nd(equal_to<int>(), 5)); 
  cout << "Found " << all.size() << " matching elements: ";
  for (vector<int*>::iterator it = all.begin(); it != all.end(); ++it) {
    cout << **it << " ";
  return (0);

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