OE>ifstream inputFile("filename.txt");
OE>vector<char> filedata( ( istreambuf_iterator<char>( inputFile ) ), istreambuf_iterator<char>() );
OE>

example.cpp
D:\WORK\test2\example.cpp(846) : error C2664: '__thiscall std::vector<char,class std::allocator<char> >::std::vector<char,class std::allocator<char> >(unsigned int,const char &,const class std::allocator<char> &)' : cannot convert parameter 1 from '
class std::istreambuf_iterator<char,struct std::char_traits<char> >' to 'unsigned int'
No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called