Question

C++
How to write a function to check if dynamic array from class is empty?

Answer 1

Without seeing the actual dynamic array, which is basically a vector:

bool isEmpty( array )
// return true if empty
// return full if it has elements
{
return( array.size() > 0 ? false : true );
}

Answer 2

Actually if it is an std container (like std::vector or std::array) then you can simply do `array.empty()` to find out whether it is empty or not. for example:
http://www.cplusplus.com/reference/array/array/empty/