ssrs barcode font pdf < previous page in Software

Drawing QR Code in Software < previous page

< previous page
QR Code Recognizer In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
QR-Code Encoder In None
Using Barcode creator for Software Control to generate, create QR image in Software applications.
page_100
QR Code ISO/IEC18004 Decoder In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
Quick Response Code Maker In Visual C#.NET
Using Barcode creator for .NET framework Control to generate, create QR Code image in Visual Studio .NET applications.
next page >
QR Code ISO/IEC18004 Generation In VS .NET
Using Barcode creator for ASP.NET Control to generate, create Quick Response Code image in ASP.NET applications.
Draw QR Code 2d Barcode In VS .NET
Using Barcode maker for VS .NET Control to generate, create QR Code JIS X 0510 image in .NET framework applications.
< previous page
Printing Denso QR Bar Code In Visual Basic .NET
Using Barcode generator for Visual Studio .NET Control to generate, create Denso QR Bar Code image in .NET framework applications.
Generate Data Matrix In None
Using Barcode drawer for Software Control to generate, create Data Matrix ECC200 image in Software applications.
page_101
Barcode Maker In None
Using Barcode generation for Software Control to generate, create barcode image in Software applications.
Code 128 Encoder In None
Using Barcode creation for Software Control to generate, create ANSI/AIM Code 128 image in Software applications.
next page >
EAN13 Creator In None
Using Barcode creation for Software Control to generate, create EAN13 image in Software applications.
Generating EAN / UCC - 13 In None
Using Barcode encoder for Software Control to generate, create EAN / UCC - 13 image in Software applications.
Page 101
Uniform Symbology Specification Codabar Creation In None
Using Barcode encoder for Software Control to generate, create Code-27 image in Software applications.
Drawing Code 128C In None
Using Barcode creator for Online Control to generate, create Code 128C image in Online applications.
Remember! When the definitions are separated from the declarations, the declaration section is called the class interface, and the definition section is called the implementation. The interface is the part of the class that the programmer needs to see in order to use the class.
UCC - 12 Creator In Objective-C
Using Barcode creation for iPhone Control to generate, create EAN / UCC - 14 image in iPhone applications.
ECC200 Creation In Java
Using Barcode encoder for Android Control to generate, create DataMatrix image in Android applications.
Constructors and Initialization Lists The Rational class defined in Ex. 8.1 uses the assign() function to initialize its objects. It is more natural to allow initialization when the objects are declared. That's how ordinary (predefined) types work: int n = 22; char* s = "Hello"; C++ uses constructor functions to allows this style of initialization. A constructor is a method that is invoked automatically when an object is declared. A constructor function has the same name as the class itself and it is declared without a return type. Ex 8.3 illustrates how we can replace the assign ( ) function with a constructor. Example 8.3 A Constructor Function for the Rational Class class Rational { public: Rational(int n, int d) void print() private: int num, den; };
GS1 128 Creation In Java
Using Barcode printer for Java Control to generate, create EAN / UCC - 14 image in Java applications.
Generating EAN128 In .NET
Using Barcode encoder for VS .NET Control to generate, create EAN 128 image in VS .NET applications.
{num=n; den=d;} {cout <<num <<'/' <<den;}
Bar Code Encoder In Visual Studio .NET
Using Barcode generation for Reporting Service Control to generate, create bar code image in Reporting Service applications.
Barcode Maker In Java
Using Barcode maker for Android Control to generate, create bar code image in Android applications.
We can now declare rationals as Rational x(-1,3), y(22,7); the function of which has the same effect as the assign() function had in Ex. 8.1. When the declaration of x executes, the constructor is called automatically and the integers -1 and 3 are passed to its parameters n and d and assigned to x's num and den data members. A class's
< previous page
page_101
next page >
< previous page
page_102
next page >
Page 102
constructor "constructs" the class objects by allocating and initializing storage for the objects. A class may have many constructors. Like all overloaded functions, they are distinguished by having distinct parameter lists. For example: Rational() {num=0; den=l;} Rational(int n) {num=n; den=l;} Rational(int n, int d) {num=n; den=d;} The first has no parameters and initializes the declared object with the default values 0 and 1. The second has one int parameter and initializes the object to be the fractional equivalent of that integer. The third constructor is the same as in Ex. 8.3. Among the various constructors that a class may have, the simplest is the one, called the default constructor, has no parameters. If this constructor is not explicitly declared in the class definition, the system will automatically create one. That is what happens in Ex. 8.1. These could also be written equivalently using initialization lists as: Rational(): num(0), den (l) { } Rational(int n): num (n), den (l) { } Rational(int n, int d): num (n), den (d) { } Note that the list begins with a colon and precedes the function body. These three separate constructors are not necessary. They could be combined into a single constructor, using default parameter values: Rational(int n=0, int d=l): num ( ), den (d) { } In the declaration: Rational x, y(4), z(22,7); x will represent 0/1, y will represent 4/1, and z will represent 22/7. Recall that the default values are used when actual parameters are not passed. In the declaration of the Rational object x, the formal parameters n and d are given default values of 0 and 1, respectively. In the declaration of the object y, n is given that value 4 and d is given the default value 1. No default values are used in the declaration of z. Access Functions Although a class's member data are usually declared private to limit access, it is also common to include public methods that provide read-only access to the data. Such functions are called access functions.
< previous page
page_102
next page >
< previous page
page_103
next page >
Page 103
Example 8.4 Access Functions in the Rational Class class Rational { public: Rational (int n=0, int d=l) : num (n), den(d) { } int numerator() const {return num;} int denominator() const {return den;} private: int hum, den; }; void main() { Rational x (22,7); cout <<x.numerator() <<'/' <<x.denominator() <<endl; } The functions numerator() and denominator() return the values of the private member data. The const keyword in the declarations of the two access functions allows them to be applied to constant objects. Private Methods Class member data are usually declared private and methods public. This dichotomy is not required. It is often useful to declare one or more methods to be private. As such, these functions can only be used within the class itself; i.e., they are local utility functions. Example 8.5 Using private Functions gcd() and reduce() class Rational { public: Rational (int n=0, int d=l): num (n), den (d) {reduce();} void print() {cout <<num <<'/' <<den <<endl;} private: int num, den; int gcd (int j, int k) { return k j: gcd(k, j%k); } void reduce() {int g=gcd(num,den); num/=g; den/=g;} }; void main() {
Copyright © OnBarcode.com . All rights reserved.