C/C++ the result of the uninitialized array

Question

It might be a boring question! thanks!

Here\'s the code:

#include 
#include 
using namespace std;

int main()
{
               


        

Answer 1

The behaviour on reading uninitialised elements of an array is undefined. The compiler is allowed to do anything.

(All the elements of a can be read due to the brace initialisation, although in C++ you can write int a[5] = {};).