(STL)for_each、find_if用法

/---------------------------------------for_each-----------------------------------

#include <iostream>
#include <list>
#include <algorithm>

using namespace std;

struct print
{
 int count;
 print(){count = 0;}
 void operator()(int x)
 {
  cout << 3 * x << endl;
  count++;
 }
};
int main(void)
{

 list<int> l;
 l.push_back(29);
 l.push_back(32);
 l.push_back(16);
 l.push_back(22);
 l.push_back(27);

 print p = for_each(l.begin(), l.end(), print());
 cout << p.count << endl;
 return 0;
}

//--------------------------------find_if--------------------------------------------------------

#include <iostream>
#include <list>
#include <algorithm>

using namespace std;

bool divby5(int x)
{
 return x % 5 ? 0 : 1;
};
int main(void)
{

 list<int> l;
 l.push_back(29);
 l.push_back(32);
 l.push_back(16);
 l.push_back(22);
 l.push_back(25);
 l.push_back(27);

 list<int>::iterator iLocation;
 iLocation = find_if(l.begin(), l.end(), divby5);
 if (iLocation != l.end())
 {
  cout << *iLocation << endl;
 }
 return 0;
}