Wikibooks

C++ Language/ProgramFlow/Parameters/DefaultParameter

< C++ Language | ProgramFlow | Parameters
C++ Language
  1. Overview
  2. Preprocessing
    1. Macros
    2. Tokenization
    3. Preprocessing Strings
    4. Compile-time Constants
    5. Compile-time Assertions
    6. Conditional-Compilation
  3. Namespace
    1. Namespace Shortcuts
    2. Nesting
    3. Splitting across Files
    4. Named and Unnamed
  4. Type
    1. Hungarian Prefixes
    2. Boolean
    3. Literals
    4. Bitwise Representation
    5. Max Value
    6. Conversion
    7. Enumeration
    8. Shortcuts
    9. Variant
    10. RTTI: RunTime Type Information
  5. Variables
    1. Lifetime and Scope
    2. Initialization
    3. Uniform Initialization
    4. Initialize without Constructor
    5. Decomposing-Auto
    6. Define at Same Time as Type
  6. Indirection
    1. Pointers
    2. Typed NULL
    3. Arrays
    4. Reference Variables
    5. Rvalue-References
    6. Smart Pointers
  7. Expressions
    1. Precedence
    2. Chain of Assignment
  8. Program Flow
    1. Loops
    2. The break Statement
    3. Return Value
    4. Parameters
    5. Function Overloading
    6. Function-Pointer
    7. Deprecating a Function
  9. Objects
    1. Accessibility
    2. Unwanted Compiler-Generated Functions
    3. Constructors
    4. Destructors
    5. Const Members
    6. Static Members
    7. Inheritance
    8. Operator Overloading
    9. Nested Classes
    10. Pointer to Members
    11. Low-Level C Structures
  10. Templates
    1. Templated-Functions
    2. Templated-Classes
    3. Templated-Variables
    4. Template-Parameters
    5. Traits
    6. Metaprogramming
    7. Concepts
  11. Error Handling
    1. Returning an Error Code
    2. Assertions
    3. C++ Exception Handling
  12. Standard Libraries
    1. C-Runtime
    2. STL: Standard Template Library
    3. Strings
    4. IOStreams
    5. Filesystem Access
    6. Multithreading
    7. RNG: Random Number Generator
  13. Obsolete Features

When defining a function having a parameter, you can specify a default value that will be used if the caller doesn't provide a value for that parameter. For a member function, this should appear in the class definition as void DoMember(int aiParam = 123); (use ordinary syntax when implementing this function).

Additional information about default parameters (includes interactive examples)

Retrieved from "https://en.wikibooks.org/w/index.php?title=C%2B%2B_Language/ProgramFlow/Parameters/DefaultParameter&oldid=4035607"