C | Storage Classes and Type Qualifiers | Question 19

Output?

#include <stdio.h>
int main()
{
  register int i = 10;
  int *ptr = &i;
  printf("%d", *ptr);
  return 0;
}

(A) Prints 10 on all compilers
(B) May generate compiler Error
(C) Prints 0 on all compilers
(D) May generate runtime Error

Answer: (B)
Explanation: See point 1 of Register Keyword
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