vector insert() warning message - c++

Question

I'm a c++ beginner. I get this warning message in my code:
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xmemory(208): warning C4244: 'initializing' : conversion from 'double' to 'int', possible loss of data
1> C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xmemory(280) : see reference to function template instantiation 'void std::allocator<_Ty>::construct<double&>(int *,_Other)' being compiled
1> with
1> [
1> _Ty=int,
1> _Other=double &
1> ]
1> C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\vector(668) : see reference to function template instantiation 'void std::_Cons_val<std::allocator<_Ty>,int,double&>(_Alloc &,_Ty1 *,_Ty2)' being compiled
1> with
1> [
1> _Ty=int,
1> _Alloc=std::allocator<int>,
1> _Ty1=int,
1> _Ty2=double &
1> ]
1> C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\vector(688) : see reference to function template instantiation 'void std::vector<_Ty>::emplace_back<double&>(_Valty)' being compiled
1> with
1> [
1> _Ty=int,
1> _Valty=double &
1> ]
1> C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\vector(675) : see reference to function template instantiation 'std::_Vector_iterator<_Myvec> std::vector<_Ty>::emplace<double&>(std::_Vector_const_iterator<_Myvec>,_Valty)' being compiled
1> with
1> [
1> _Myvec=std::_Vector_val<int,std::allocator<int>>,
1> _Ty=int,
1> _Valty=double &
1> ]
1> preprocessDoc.cpp(14054) : see reference to function template instantiation 'std::_Vector_iterator<_Myvec> std::vector<_Ty>::insert<double&>(std::_Vector_const_iterator<_Myvec>,_Valty)' being compiled
1> with
1> [
1> _Myvec=std::_Vector_val<int,std::allocator<int>>,
1> _Ty=int,
1> _Valty=double &
1> ]
The code compiles without any error however I want to get rid of this warning. The line where I am getting the warning is:
void PreprocessDoc::AddDisplay(double d_display, int pattern)
{
if(pattern==1)
{
d_displayYT.insert(d_displayYT.end(), d_display); //this line
YTtoYrn();
}
}
Any help would be good

Answer 1

_Myvec=std::_Vector_val<int,std::allocator<int>>,
The compiler is telling you that you're converting a double to int. If the double is say 42.666 what is stored is just 42. It's warning you in case this was not intended.
If that's really what you want then do as David suggests. If it's not then you need to change the type the vector holds.

Answer 2

Change:
d_displayYT.insert(d_displayYT.end(), d_display); //this line
to:
d_displayYT.insert(d_displayYT.end(), static_cast<int>(d_display));