My char pointer points to invalid value after being cast from int*

Question

I am learning C programming language, I have just started learning arrays with pointers. I have problem in this question, I hope the that output must be

Answer 1

On a 32 bit platform, int is four times the size of char. When you add 4 to ptr, you add 4 times the size of what ptr points to to ptr (which itself is a memory location). That happens to be the address of the second element in the int array.

On a 64 bit platform, int is eight times the size of char; and your output would be very different.

To cut a long story short, your code is not portable, (also see Joachim Pileborg's answer re endianness) but amusing to unpick.