c++ 查找容器中符合条件的元素，并返回iterator（find_if）

#include <iostream>     // std::cout
#include <algorithm>    // std::find_if
#include <vector>       // std::vector
using namespace std;
bool IsOdd (int i) {
  return ((i%)==);
}

int main () {
  vector<int> myvector;

  myvector.push_back();
  myvector.push_back();
  myvector.push_back();
  myvector.push_back();

  vector<int>::iterator it = std::find_if (myvector.begin(), myvector.end(), IsOdd);
  cout << "The first odd value is " << *it << '\n';

  return ;
}