Final answer:
The expression *(ptr + 1) increments the pointer before dereferencing to access the next array element, while *ptr + 1 adds 1 to the value pointed at by the pointer without changing the pointer itself.
Step-by-step explanation:
The difference between *(ptr + 1) and *ptr + 1 lies in the operations' precedence and what they actually do with the pointer ptr. *(ptr + 1) refers to the value at the memory location immediately after the one ptr points to. This expression increments the pointer itself and then dereferences it, effectively accessing the next element in an array.
On the other hand, *ptr + 1 adds 1 to the value that ptr is pointing at. Here, the pointer is dereferenced first to get the value at its current location, and then 1 is added to that value, not affecting the pointer position.
The difference between *(ptr + 1) and *ptr + 1 lies in the order of operations in C programming language.
When you write *(ptr + 1), the expression first evaluates (ptr + 1) to calculate the memory address of the element at one position ahead of the pointer. Then, it dereferences the resulting address to retrieve the value stored there.
On the other hand, when you write *ptr + 1, the expression first dereferences the pointer ptr to retrieve the value stored at that memory location. It then adds 1 to that value.