C++ | const keyword | Question 1
Predict the output of following program
* p =
**q = &p;
*s = ++p;
cout << *++s;
(A) Compiler Error
(D) Garbage Value
Explanation: Output is ‘c’
const char* p = “12345″ declares a pointer to a constant. So we can’t assign something else to *p, but we can assign new value to p.
const char **q = &p; declares a pointer to a pointer. We can’t assign something else to **q, but we can assign new values to q and *q.
*q = “abcde”; changes p to point to “abcde”
const char *s = ++p; assigns address of literal ”bcde” to s. Again *s can’t be assigned a new value, but s can be changed.
The statement printf(“%cn”, *++s) changes s to “cde” and first character at s is printed.
Quiz of this Question
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