Can anyone help me with this question?

Question

int *P, A[3] = {0, 1, 2};
P = A;
*(P+2) = 5;
P = A++;
*P = 7;
What are the values stored in the array A from index 0 to index 2 after execution of the above code?

Answer 1

Got error message 'lvalue expected ...' on this line `P = A++;`, but it can work if we replace it by `P = A + 1;` by which we have 0, 7, 5 in array <A> (may not be what you meant to do).

I couldn't quite explain though, I'm just bookmarking this to get notified when an explanation is given 👍

Answer 2

Why don't you use printf() to see them?

Answer 3

I see, we cannot postincrement an array address A.

You could do
*(P++ + 2) = 5;
and remove the next line which gives the error, and obtain 0,7,5

but take into account that a postincrement would assign (if it worked) A to P, and not A+1
In that case you would obtain 7,1,5