Question

What will be the output of the following C++ function?

1. int main()

2.     {

3.         register int i = 1;

4.         int *ptr = &i;

5.         cout << *ptr;

6. 	return 0;

7.     }

a) Runtime error may be possible
b) Compiler error may be possible
c) 1
d) 0

Answer 1

Answer: b
Explanation: Using & on a register variable may be invalid, since the compiler may store the variable in a register, and finding the address of it is illegal.