Bind ?

Question

For some reason I am having an issue binding a group of form fields
I have a group of form fields - if a checkbox is selelected, I need to bind group 1 form fields to group 2 form fields.  Any help would be great.

Answer 1

Hi Igor and everyone
Having read MSDN library about 'bind', I have written the following
short program. It gives me compiler errors. Can you please help me
understand why? Using VS2012, I can't double click on error to see which line causes the error. 
Thanks
Chong
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
#include <functional>
#include <iostream>
using namespace std;
using namespace std::placeholders;
class A
public:
    void Fun(int param, int b){cout<<param<<" "<<b<<"\n";}
typedef void (A::*fptr)(int,int);//Don't need this!
int main()
    A obj;
    auto f = std::bind(&A::Fun,_2,_1);//compiler error:term does not evaluate to
                                      //a function taking 2 arguments??
    f(4,3);//want to print "3 4"
 /* The following is ok!
    auto g = std::bind(&A::Fun, obj,_2,0);
    g(4,5);//2nd arguement 5 as the 1st and 1st argument as the 2nd and 0.
    return 0;
Error(s):
source_file.cpp(20) : error C3536: 'f': cannot be used before it is initialized
source_file.cpp(20) : error C2064: term does not evaluate to a function taking 2 arguments