Why it is not allowed to pass arrays by value to a function in C and C++?

Question

C and C++ allows passing of structure and objects by value to function, although prevents passing arrays by values.

Why?

Answer 1

In C/C++, internally, an array is passed as a pointer to some location, and basically, it is passed by value. The thing is, that copied value represents a memory address to the same location.

In C++, a vector is copied and passed to another function, by the way.