C++ pass an array by reference
arrays, c++, pass-by-reference, pointers, reference
Solution
Arrays can only be passed by reference, actually:
void foo(double (&bar)[10])
{
}
This prevents you from doing things like:
double arr[20];
foo(arr); // won't compile
To be able to pass an arbitrary size array to `foo`, make it a template and capture the size of the array at compile time:
template<typename T, size_t N>
void foo(T (&bar)[N])
{
// use N here
}
You should seriously consider using `std::vector`, or if you have a compiler that supports c++11, `std::array`.
Problem
is this allowed to pass an array by reference ? ``` void foo(double& *bar) ``` Seems that my compiler says no. Why? What is the proper way to pass an array by reference? Or a work around? I have an array argument that my method should modify and that I should retrieve afterwards. Alternatively, I could make this array a class member, which works fine, but it has many drawbacks for other part of my code (that I would like to avoid). Thanks and regards.