Q:

Can Bitwise Operation on NULL value crash the code in C++

It seems that my program crashes on this line where im doing some bitwise operation on "a" array filled with NULL values (empty array), can this be a cause to program crash?
const unsigned char a [ something ];
int b;
b = (a[0] & 0x0f) << 8; 

A:

No, the code below
const unsigned char a [ something ];
int b;
b = (a[0] & 0x0f) << 8; 

by itself cannot cause your program to crash. Something else is wrong with your code.

