Problem with Binders

Hi,

I am working with STL and found a problem with using binders.

The code I am using is as follow:

Code:

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


int main()
{
     vector<string> vecstr;

     vecstr.push_back("aaaa");
     vecstr.push_back("bbbb");
     vecstr.push_back("zzzz");
     vecstr.push_back("bbbb");

int d = ( int ) count_if(vecstr.begin(), vecstr.end(), bind1st(equal_to(),"bbbb") );
cout << "\n d = " << d << endl;

}

It's giving me error :

binder.cpp:17: error: missing template arguments before ‘(’ token

I have copy this example from net to learn Binders.

Thanks

You need to provide the template argument to equal_to:

Code:

int d = count_if(vecstr.begin(), vecstr.end(), bind1st(equal_to<string>(), "bbbb"));

Thanks for help !