Question

Possible Duplicate:
Address of register variable

I know that getting address of register variable is not allowed in c . But why this code is getting compiled in c++ and not in c.

int main()
{
    register int a;
    printf("%u\n",&a);
}

Answer 1

The keyword register is only a hint to the compiler. In fact, most compilers today ignore it as they contain advanced code to pick the best register variable candidates anyway.

Whenever you take the address of a variable, it is typically placed on the stack, despite the fact that you have used the register keyword.