Errors in Xutility after defining _SCL_SECURE_NO_WARNINGS - c++

Question

I am trying to implement a class for calculating the dot product of two vectors.
float dotProduct(vec2 v1, vec2 v2)
{
if (v1.Length() != v2.Length()) { return NULL; }
return (float)std::inner_product(v1.x, v1.y, v2.x, 0.0);
}
When I complie this i get:
Error 1 error C4996: 'std::_Inner_product2': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\numeric 121
So i add #define _SCL_SECURE_NO_WARNINGS
But then I get a bunch of errors in xutility
Error 1 error C2825: '_Iter': must be a class or namespace when followed by '::' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 371
Error 2 error C2039: 'iterator_category' : is not a member of '`global namespace'' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 371
Error 3 error C2146: syntax error : missing ';' before identifier 'iterator_category' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 371
Error 4 error C2602: 'std::iterator_traits<_InIt>::iterator_category' is not a member of a base class of 'std::iterator_traits<_InIt>' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 371
Error 5 error C2868: 'std::iterator_traits<_InIt>::iterator_category' : illegal syntax for using-declaration; expected qualified-name C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 371
Error 6 error C2825: '_Iter': must be a class or namespace when followed by '::' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 372
Error 7 error C2039: 'value_type' : is not a member of '`global namespace'' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 372
Error 8 error C2146: syntax error : missing ';' before identifier 'value_type' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 372
Error 9 error C2602: 'std::iterator_traits<_InIt>::value_type' is not a member of a base class of 'std::iterator_traits<_InIt>' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 372
Error 10 error C2868: 'std::iterator_traits<_InIt>::value_type' : illegal syntax for using-declaration; expected qualified-name C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 372
Error 11 error C2825: '_Iter': must be a class or namespace when followed by '::' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 373
Error 12 error C2039: 'difference_type' : is not a member of '`global namespace'' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 373
Error 13 error C2146: syntax error : missing ';' before identifier 'difference_type' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 373
Error 14 error C2602: 'std::iterator_traits<_InIt>::difference_type' is not a member of a base class of 'std::iterator_traits<_InIt>' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 373
Error 15 error C2868: 'std::iterator_traits<_InIt>::difference_type' : illegal syntax for using-declaration; expected qualified-name C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 373
Error 16 error C2825: '_Iter': must be a class or namespace when followed by '::' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 375
Error 17 error C2039: 'pointer' : is not a member of '`global namespace'' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 375
Error 18 error C2146: syntax error : missing ';' before identifier 'pointer' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 375
Error 19 error C2602: 'std::iterator_traits<_InIt>::pointer' is not a member of a base class of 'std::iterator_traits<_InIt>' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 375
Error 20 error C2868: 'std::iterator_traits<_InIt>::pointer' : illegal syntax for using-declaration; expected qualified-name C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 375
Error 21 error C2825: '_Iter': must be a class or namespace when followed by '::' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 376
Error 22 error C2039: 'reference' : is not a member of '`global namespace'' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 376
Error 23 error C2146: syntax error : missing ';' before identifier 'reference' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 376
Error 24 error C2602: 'std::iterator_traits<_InIt>::reference' is not a member of a base class of 'std::iterator_traits<_InIt>' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 376
Error 25 error C2868: 'std::iterator_traits<_InIt>::reference' : illegal syntax for using-declaration; expected qualified-name C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 376
Error 26 error C2665: 'std::_Debug_range2' : none of the 2 overloads could convert all the argument types C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xutility 584

Answer 1

Check the documentation
http://en.cppreference.com/w/cpp/algorithm/inner_product
You are passing values not the iterators. this fuction can create product for longer vectors, so it requires start and end of the data, try this;
std::inner_product(v1.begin(), v1.end(), v2.begin(), 0.0);