TAILIEUCHUNG - Lecture Programming in C++ - Chapter 11: Pointer variables

On completion of this chapter students will know how to: Declare and initialize pointer variables, pass addresses to functions, return an address from a function, reserve memory during execution, link classes with accessor functions. | Chapter 11 – Pointer Variables Declaring a Pointer Variable Declared with data type, * and identifier type* pointer_variable; * follows data type Usually no space between so more obvious Space allowed, so 1 or more would still work Reserves space for storage Must initialize or assign address Lesson Assigning an Address Use the "address of" operator (&) General form: pointer_variable = &ordinary_variable Lesson Name of the pointer Name of ordinary variable Using a Pointer Variable Can be used to access a value Unary operator * used * pointer_variable In executable statement, indicates value Common practice to use suffix ptr for pointer variables Example: width_ptr Lesson Pointer Operators Ampersand & Address of Asterisk * Get value at the address Lesson Uses of * Binary multiplication operator volume = height * depth * width; Declaration specifier indicating address to be stored in variable's memory cell double* height_address; Unary operator indicating to .

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