C++ TutorialLesson 23Free preview

C++ Pointers

This lesson is part of C++ · All levels

Summary

This lesson is about pointers, which are special variables that store memory addresses from other variables. With the operator & you take the address, and with the operator * you open the content of the address. Pointer provides flexible control over data and is the basis for understanding memory management in C++.

Key points

Pointers are declared with a *name type, e.g. int *p;.
Operator & takes the address of a variable.
The operator * on the pointer reads the value at the designated address.
Pointers that are invalid or nullptr should not be deferred.

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