Problem with Binders

This is a discussion on Problem with Binders within the C++ Programming forums, part of the General Programming Boards category; Hi, I am working with STL and found a problem with using binders. The code I am using is as ...

  1. #1
    Registered User
    Join Date
    Jan 2007
    Posts
    113

    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 Ď(í token
    I have copy this example from net to learn Binders.

    Thanks

  2. #2
    C++ Witch laserlight's Avatar
    Join Date
    Oct 2003
    Location
    Singapore
    Posts
    23,628
    You need to provide the template argument to equal_to:
    Code:
    int d = count_if(vecstr.begin(), vecstr.end(), bind1st(equal_to<string>(), "bbbb"));
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  3. #3
    Registered User
    Join Date
    Jan 2007
    Posts
    113
    Thanks for help !

Popular pages Recent additions subscribe to a feed

Similar Threads

  1. Memory problem with Borland C 3.1
    By AZ1699 in forum C Programming
    Replies: 16
    Last Post: 11-16-2007, 10:22 AM
  2. Someone having same problem with Code Block?
    By ofayto in forum C++ Programming
    Replies: 1
    Last Post: 07-12-2007, 08:38 AM
  3. A question related to strcmp
    By meili100 in forum C++ Programming
    Replies: 6
    Last Post: 07-07-2007, 02:51 PM
  4. WS_POPUP, continuation of old problem
    By blurrymadness in forum Windows Programming
    Replies: 1
    Last Post: 04-20-2007, 06:54 PM
  5. beginner problem
    By The_Nymph in forum C Programming
    Replies: 4
    Last Post: 03-05-2002, 04:46 PM

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21