C++ How to Program, 10/e

Summary

Section 8.2 Pointer Variable Declarations and Initialization

• Pointers are variables that contain as their values memory addresses of other variables.

• The declaration

  
  int* ptr;
  

  declares ptr to be a pointer to a variable of type int and is read, “ptr is a pointer to int.” The * as used here in a declaration indicates that the variable is a pointer.

• You can initialize a pointer with an address of an object of the same type or with nullptr (p. 342).

• The only integer that can be assigned to a pointer without casting is 0.

Section 8.3 Pointer Operators

• The & (address) operator (p. 342) obtains the memory address of its operand.

• The operand of the address operator must be a variable name (or another lvalue); the address operator cannot ...