C | Storage Classes and Type Qualifiers | Question 17

Output?

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#include <stdio.h>
  
int main(void)
{
    int i = 10;
    const int *ptr = &i;
    *ptr = 100;
    printf("i = %d\n", i);
    return 0;
}

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(A) i = 100

(B) i = 10

(C) Compiler Error

(D) Runtime Error



 Answer: (C) 

Explanation: Note that ptr is a pointer to a constant.  So value pointed cannot be changed using the pointer ptr.  See Const Qualifier in C for more details.

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