Why isn't the size of an array parameter the same as within main?

Question

Why isn\'t the size of an array sent as a parameter the same as within main?

#include 

void PrintSize(int p_someArray[10]);

int main () {
           


        

Answer 1

In c++ you can pass an array by reference for this very purpose :

void foo(int (&array)[10])
{
    std::cout << sizeof(array) << "\n";
}