PROCEDURES in .NET

Creator QR-Code in .NET PROCEDURES

PROCEDURES
Recognize QR Code JIS X 0510 In VS .NET
Using Barcode Control SDK for .NET Control to generate, create, read, scan barcode image in VS .NET applications.
Quick Response Code Printer In .NET
Using Barcode generator for Visual Studio .NET Control to generate, create QR Code JIS X 0510 image in Visual Studio .NET applications.
[CHAP. 7
QR Reader In .NET Framework
Using Barcode reader for VS .NET Control to read, scan read, scan image in .NET applications.
Bar Code Creator In .NET
Using Barcode creation for VS .NET Control to generate, create bar code image in Visual Studio .NET applications.
(The declaration could, of course, begin with the keyword Private or the keyword Public, as discussed in Sec. 7.5.) Function procedures are defined in the same manner. Optional arguments must always follow mandatory arguments in the argument list. A default value may be specified for each optional argument, by writing
Scan Bar Code In .NET Framework
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
QR Code JIS X 0510 Drawer In Visual C#
Using Barcode creation for Visual Studio .NET Control to generate, create QR-Code image in Visual Studio .NET applications.
Optional argument As data type = value
QR Code Creator In VS .NET
Using Barcode printer for ASP.NET Control to generate, create QR Code image in ASP.NET applications.
Generate QR Code In VB.NET
Using Barcode maker for .NET framework Control to generate, create Denso QR Bar Code image in .NET applications.
The default value will be assigned to the argument if an actual argument value is not provided in the procedure reference.
Creating Data Matrix ECC200 In VS .NET
Using Barcode creation for .NET framework Control to generate, create DataMatrix image in VS .NET applications.
Draw Matrix 2D Barcode In .NET Framework
Using Barcode creation for VS .NET Control to generate, create 2D Barcode image in .NET applications.
EXAMPLE 7.11
Making Code 3 Of 9 In Visual Studio .NET
Using Barcode generation for VS .NET Control to generate, create Code-39 image in .NET framework applications.
Printing International Standard Serial Number In VS .NET
Using Barcode printer for .NET framework Control to generate, create ISSN - 10 image in VS .NET applications.
Here is a skeletal outline showing a function procedure that utilizes an optional argument.
Recognize Code 3/9 In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
Drawing Code-39 In Java
Using Barcode printer for Eclipse BIRT Control to generate, create Code 39 Full ASCII image in BIRT applications.
Private Function Sample(x As Integer, Optional y As Integer = 999) As Integer Sample = x ^ 2 If (y = 999) Then 'bypass remaining calculations Exit Function Else 'modify result using optional argument Sample = x ^ 2 + y ^ 2 EndIf End Function
Decoding Bar Code In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
Recognize Bar Code In VB.NET
Using Barcode Control SDK for .NET Control to generate, create, read, scan barcode image in .NET framework applications.
Note that the second argument, y, is optional and is assigned a default value of 999. If this function is accessed with only one argument, e.g.,
Universal Product Code Version A Scanner In Visual C#
Using Barcode scanner for .NET framework Control to read, scan read, scan image in .NET framework applications.
Scan Barcode In Visual Basic .NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET framework applications.
n = Sample(3)
Bar Code Printer In Java
Using Barcode maker for Java Control to generate, create bar code image in Java applications.
Create Bar Code In Java
Using Barcode creation for BIRT reports Control to generate, create barcode image in BIRT applications.
it will return a value of 9. However, if the function is accessed with two arguments, e.g.,
n = Sample(3, 4)
it will return a value of 25. Here is a sub version of the same procedure.
Private Sub Sample(x As Integer, z As Integer, Optional y As Integer = 999) z = x ^ 2 If (y = 999) Then Exit Function Else z = x ^ 2 + y ^ 2 EndIf End Function 'bypass remaining calculations 'modify result using optional argument
Note that the optional argument (y) appears at the end of the list of arguments, as required. If this procedure is accessed as
Sample(3, 0)
CHAP. 7]
PROCEDURES
it will assign a value of 9 to the second argument (z). But if the procedure access is written as
Sample(3, 0, 4)
then the second argument will be assigned a value of 25.
Review Questions
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 What is a module in Visual Basic How do form modules differ from general modules What is the difference between a module and a procedure Name three significant advantages to the use of procedures. What is the difference between a sub procedure and an event procedure What is the difference between a sub procedure and a function procedure How are sub procedures named Does a sub procedure name represent a data item What is the purpose of arguments Are arguments required in every procedure How are arguments written within the first line of a procedure definition Summarize the rules for writing the first and last lines of a sub procedure.
7.10 Cite two different ways to access a sub procedure. 7.11 Describe the correspondence that is required between the arguments in a procedure access and the arguments that appear in a procedure definition. 7.12 What is meant by passing an argument by reference 7.13 What is meant by passing an argument by value How does this differ from passing an argument by reference 7.14 What type of argument passing (i.e., by reference or by value) does Visual Basic employ as a default 7.15 Within the first line of a procedure definition, how can you specify that an argument will be passed by reference How can you specify that it will be passed by value 7.16 Can a single procedure include some arguments that are passed by reference and other arguments that are passed by value 7.17 Can arguments be utilized within an event procedure 7.18 When defining an event procedure, how can the event type be associated with the procedure code 7.19 How are function procedures named Does a function procedure name represent a data item Compare with the rules that apply to the naming of sub procedures.
PROCEDURES
[CHAP. 7
7.20 Summarize the rules for writing the first and last lines of a function procedure. Compare with the rules that apply to sub procedures. 7.21 Why would a function procedure name be assigned a value Can a sub procedure name be assigned a value 7.22 Can a function procedure name be assigned a value at more than one location within a function procedure 7.23 How is a function procedure accessed Compare with the methods used to access a sub procedure. 7.24 What is meant by the scope of a procedure How is the scope of a procedure affected by use of the keywords Public and Private in the first line of the procedure definition 7.25 What is meant by the scope of a variable How is the scope of a variable affected by use of the keywords Public and Private in the variable declaration 7.26 How can a variable within a procedure be made to retain its assigned value after the procedure has been executed and control is returned to the calling portion of the program 7.27 How can all varibles within a procedure be made to retain their assigned values after the procedure has been executed and control is returned to the calling portion of the program Compare with the answer to the preceding question. 7.28 How can control be transferred out of a procedure without executing all of the instructions within the procedure 7.29 When accessing a procedure, how can the passing of one or more arguments be made optional 7.30 Where must optional arguments be placed within a procedure definition, relative to required arguments 7.31 How is an optional argument assigned a default value within a procedure definition
Copyright © OnBarcode.com . All rights reserved.