C :: Postfix And Prefix On Array Pointer

first code,

Code:

int aRRay[] = {2,4,8,-2,-1,100};
int *ptr;
int loop;
ptr = &aRRay[0];
}

[code].....

first code result, " aRRay[] " and " ptr + loop " are in the same result
second code result, " aRRay[] " and "ptr + loop " are in the same result too,
third code result, " aRRay[] " and "ptr + loop " are in the same result Except "aRRay[4] = -1 with ptr + 4 = 100 " and "aRRay[5] = 100 with ptr + 5 = 14"

Question:Why the third code had a different result ? Its only because of the increment ++ptr or the round brackets on the *(++ptr) ?