Exercise 133 in Java

Generator QR Code in Java Exercise 133
Exercise 133
Denso QR Bar Code Maker In Java
Using Barcode generator for Java Control to generate, create QR Code 2d barcode image in Java applications.
Explain the behavior of copy() in the following invocation:
Painting Barcode In Java
Using Barcode maker for Java Control to generate, create bar code image in Java applications.
Screen myScreen; myScreencopy( myScreen );
Decode Bar Code In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
Exercise 134
QR-Code Generator In Visual C#.NET
Using Barcode generator for Visual Studio .NET Control to generate, create Quick Response Code image in .NET applications.
file:///F|/WinDDK/resources/CPPPrimer/c++primerhtm (576 / 1065) [2001-3-29 11:32:10]
Denso QR Bar Code Drawer In .NET Framework
Using Barcode maker for ASP.NET Control to generate, create QR Code JIS X 0510 image in ASP.NET applications.
file:///F|/WinDDK/resources/CPPPrimer/c++primerhtm
Making QR Code In Visual Studio .NET
Using Barcode creator for .NET Control to generate, create QR Code 2d barcode image in Visual Studio .NET applications.
Additional cursor movements might include moving forward or backward one character at a time On reaching the bottom right corner or top left corner of the screen, the cursor wraps around Implement the forward() and backward() functions
Drawing QR-Code In VB.NET
Using Barcode generator for .NET Control to generate, create QR Code 2d barcode image in Visual Studio .NET applications.
Exercise 135
Barcode Generator In Java
Using Barcode drawer for Java Control to generate, create bar code image in Java applications.
Another useful capability might include moving the cursor up or down one row of the screen On reaching the top or bottom row of the screen, the cursor does not wrap around; it sounds a bell and remains where it is Implement the up() and down() functions, knowing that writing the character " 007 " to cout will sound the bell
GTIN - 12 Generation In Java
Using Barcode printer for Java Control to generate, create UPC Code image in Java applications.
Exercise 136
Code 128 Code Set C Maker In Java
Using Barcode generator for Java Control to generate, create Code 128 image in Java applications.
Revisit the Screen member functions introduced thus far and change the member functions to const member functions where appropriate Explain your decision
ECC200 Encoder In Java
Using Barcode printer for Java Control to generate, create Data Matrix ECC200 image in Java applications.
The Implicit this Pointer
Drawing Barcode In Java
Using Barcode creation for Java Control to generate, create barcode image in Java applications.
Each class object maintains its own copy of the class data members For example:
ISBN Encoder In Java
Using Barcode generator for Java Control to generate, create International Standard Book Number image in Java applications.
int main() { Screen myScreen( 3, 3 ), bufScreen; myScreenclear(); myScreenmove( 2, 2 ); myScreenset( '*' ); myScreendisplay(); bufScreenreSize( 5, 5 ); bufScreendisplay(); }
Encoding DataMatrix In .NET
Using Barcode encoder for ASP.NET Control to generate, create Data Matrix 2d barcode image in ASP.NET applications.
myScreen has its own _width, _height, _cursor, and _screen data members bufScreen has its own separate set However, there exists only one copy of each class member function Both myScreen and bufScreen call the same copy of any particular member function We have seen in the previous section that a member function can refer to the members of its class without using the member access operators The definition for the function move(), for example, is as follows:
Bar Code Maker In VS .NET
Using Barcode drawer for ASP.NET Control to generate, create bar code image in ASP.NET applications.
inline void Screen::move( int r, int c ) { if ( checkRange( r, c ) ) // valid screen position { int row = (r-1) * _width; // row location _cursor = row + c - 1; } }
Painting Code 128 In Visual C#.NET
Using Barcode drawer for Visual Studio .NET Control to generate, create Code 128 Code Set A image in .NET applications.
If the function move() is called for the object myScreen, the data members _width and _cursor accessed within move() are the data members of myScreen If the function move() is called for the object bufScreen, the data members accessed are those of bufScreen How does the data member _cursor, manipulated by move(), become bound in turn to the data member belonging to myScreen and then to the one belonging to bufScreen The short answer is the this pointer
Code 39 Encoder In .NET Framework
Using Barcode printer for ASP.NET Control to generate, create Code 3/9 image in ASP.NET applications.
file:///F|/WinDDK/resources/CPPPrimer/c++primerhtm (577 / 1065) [2001-3-29 11:32:10]
Barcode Drawer In Visual C#.NET
Using Barcode creator for VS .NET Control to generate, create barcode image in VS .NET applications.
file:///F|/WinDDK/resources/CPPPrimer/c++primerhtm
Barcode Creator In Visual Studio .NET
Using Barcode creator for .NET framework Control to generate, create barcode image in VS .NET applications.
Each class member function contains a pointer that addresses the object for which the member function is called The pointer is called this Its type in a non- const member function is a pointer to the class type, a pointer to a const class type in a const member function, and a pointer to a volatile class type in a volatile member function For example, within the member function move() of class Screen, the this pointer is of the type Screen* Within a non-const member function of the class List, the this pointer is of type List* Because the this pointer addresses the class object for which the member function is called, if the function move() is called for the object myScreen, the this pointer addresses the object myScreen Similarly, if the function move() is called for the object bufScreen, the this pointer addresses the object bufScreen The data member _cursor, manipulated by move(), becomes bound in turn to the data member belonging to myScreen and bufScreen One way of understanding this is to take a brief look at how a compiler implements the this pointer There are two transformations that must be applied to support the this pointer: 1 Translate the definition of the class member function Each class member function is defined with one additional parameter: the this pointer For example:
Code 39 Extended Creation In VS .NET
Using Barcode generation for .NET framework Control to generate, create Code 3/9 image in Visual Studio .NET applications.
// pseudocode that illustrates the compiler expansion // of a member function definition -// not legal C++ code inline void move( Screen* this, int r, int c ) { if ( checkRange( r, c ) ) { int row = (r-1) * this->_width; this->_cursor = row + c - 1; } }
In the member function definition, the use of the this pointer to access the class data members _width and _cursor is made explicit 2 Translate each invocation of the class member function to add an additional argument the address of the object for which the member function is invoked For example,
myScreenmove( 2, 2 )