C++ return array from function

Question

I would like to implement machine learning algorithm in C++ without using any C++ machine learning library. So I'm writing this initializer function for generating zero matrices but can't figure out how can I accomplish this. I'm actually trying to write C++ code for simple logistics regression for now.

float * intializer_zero(int dimension){
    // z = wx + b. 

float b = 0;
float w[dimension]= { };
return w,b;
}

It's throwing error "cannot convert 'float' to 'float' in return." How can I write this initializer function in C++?