Variable hacking

Question

Answer 1

Output will be 5,99,2

But if the a[3]= 78 was not commented, compiler would have thrown error as you are modifying const variable.

Comments

if base address og a is 100(let)

then *p = a+3

           =100 + 3

           = 106 (as integer is 2 bytes generally)

4 is modified to 99

now, a[2] = a+2*2

             =100+4

            =5

similarly,a[3]=99 and a[4]=2

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Here the a is declared as constant and we are modifying it by using a pointer  is it valid I mean will it show any error

Answer 2

This code will show error because we cannot change the value of const int either directly or by any pointer