TAILIEUCHUNG - Chapter 4 Parameters and Overloading

Used to provide access to caller’s actual argument Caller’s data can be modified by called function! Typically used for input function To retrieve data for caller Data is then "given" to caller. Specified by ampersand, &, after type in formal parameter list | Chapter 4 Parameters and Overloading Learning Objectives Parameters Call-by-value Call-by-reference Mixed parameter-lists Overloading and Default Arguments Examples, Rules Testing and Debugging Functions assert Macro Stubs, Drivers Parameters Two methods of passing arguments as parameters Call-by-value "copy" of value is passed Call-by-reference "address of" actual argument is passed Call-by-Value Parameters Copy of actual argument passed Considered "local variable" inside function If modified, only "local copy" changes Function has no access to "actual argument" from caller This is the default method Used in all examples thus far Call-by-Value Example: Display Formal Parameter Used as a Local Variable (1 of 3) Call-by-Value Example: Display Formal Parameter Used as a Local Variable (2 of 3) Call-by-Value Example: Display Formal Parameter Used as a Local Variable (3 of 3) Call-by-Value Pitfall Common Mistake: Declaring parameter "again" inside function: double .

• Kỹ thuật lập trình
• Call by Value Parameters
• Call By Reference Parameters
• Constant Reference Parameters
• Parameters and Arguments
• Mixed Parameter Lists
• Choosing Formal Parameter Names