Arrow Operator with Pointers in C/C++: quick revision, 15 bites

Arrow Operator = Dereference + Dot

One symbol replaces two operations.

The arrow operator `->` is a shortcut that does **two things at once**: it dereferences a pointer and then accesses a member.

Takeaway. `ptr->member` is exactly the same as `(*ptr).member` — just cleaner to write and read.

What Exactly Is the Arrow Operator?

A pointer's personal member-access tool.

Takeaway. Left side must be a pointer; right side must be a member name.

Why the Arrow Operator Exists

Because (*ptr).name gets ugly fast.

Takeaway. It exists purely for cleaner, safer pointer member access.

Basic Arrow Operator in Action

See it work in 5 lines.

Takeaway. `ptr->roll` reads the `roll` member of the struct that `ptr` points to.

Dot vs Arrow: When to Use Which

Object or pointer? That decides it.

Takeaway. Object → dot. Pointer → arrow. Never mix them up.

Mixing Up Dot and Arrow

The #1 beginner pointer slip.

Takeaway. If the left side is a pointer, you must use `->`.

Forgetting Parentheses in (*ptr).member

Precedence bites without brackets.

Takeaway. This precedence trap is exactly why the arrow operator was introduced.

How to Use the Arrow Operator

Four steps to pointer access.

Takeaway. Pointer must hold a valid address before you can use `->`.

Where the Arrow Operator Shines

Linked lists live on this operator.

Takeaway. Any data structure built from pointers relies heavily on `->`.

Linked List Node Traversal

Walk a list with one symbol.

Takeaway. `temp->next` moves you to the next node cleanly.

Remember It as 'Pointer Points'

Arrow = pointer pointing at a member.

Think of `->` as an **arrow pointing from the pointer to the member it wants**. If there's a pointer on the left, an arrow is the natural choice.

Takeaway. Pointer on the left → arrow on the right.

Exam Favourite: Rewrite the Expression

Exams love the (*ptr).x ↔ ptr->x swap.

Takeaway. Master the equivalence — it appears in almost every pointer question.

Never Use Arrow on a NULL Pointer

NULL + arrow = crash.

Takeaway. Arrow dereferences — so the pointer must be valid first.

Arrow Works on Class Pointers Too

Not just structs — classes too.

In C++, `->` also accesses **member functions** of a class through a pointer, e.g. `objPtr->display();` — not just data members.

Takeaway. In C++, `->` handles both data and methods through pointers.

Prefer Arrow Over (*ptr).member

Cleaner code, fewer bugs.

Takeaway. Arrow is the idiomatic, readable choice for pointer member access.