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

Because arrays decay into pointers when they are passed as parameters. This is how C works, although you can pass "arrays" in C++ by reference and overcome this issue. Note that you can pass arrays of different sizes to this function:

 // 10 is superfluous here! You can pass an array of different size!
void PrintSize(int p_someArray[10]);