Open In App

C | Storage Classes and Type Qualifiers | Question 19

Last Updated : 09 Sep, 2021
Like Article

#include <stdio.h>
int main()
    int x = 5;
    int * const ptr = &x;
    printf("%d", x);
    return 0;

(A) Compiler Error
(B) Runtime Error
(C) 6
(D) 5

Answer: (C)

Explanation: See following declarations to know the difference between constant pointer and a pointer to a constant.
int * const ptr —> ptr is constant pointer. You can change the value at the location pointed by pointer p, but you can not change p to point to other location.
int const * ptr —> ptr is a pointer to a constant. You can change ptr to point other variable. But you cannot change the value pointed by ptr.
Therefore above program works well because we have a constant pointer and we are not changing ptr to point to any other location. We are only incrementing value pointed by ptr.

Quiz of this Question

Like Article
Suggest improvement
Share your thoughts in the comments

Similar Reads