add qr code to ssrs report Short-Circuiting in a Condition in Software

Generate Denso QR Bar Code in Software Short-Circuiting in a Condition

EXAMPLE 2.12 Short-Circuiting in a Condition
Decoding QR-Code In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
QR Code JIS X 0510 Generation In None
Using Barcode printer for Software Control to generate, create QR Code image in Software applications.
This program tests integer divisibility:
Reading QR-Code In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
QR Code 2d Barcode Encoder In C#
Using Barcode drawer for .NET framework Control to generate, create QR Code ISO/IEC18004 image in Visual Studio .NET applications.
main0 1 int n, d; tout << "Enter two positive integers: "; tin >> n >> d; if (d > 0 && n%d == 0) tout << d -CC " divides ' C-C n << endl; else tout << d << " does not divide ' C-C n CC endl;
Creating QR Code In Visual Studio .NET
Using Barcode drawer for ASP.NET Control to generate, create Quick Response Code image in ASP.NET applications.
Creating Denso QR Bar Code In VS .NET
Using Barcode printer for VS .NET Control to generate, create QR Code JIS X 0510 image in Visual Studio .NET applications.
CONDITIONAL STATEMENTS AND INTEGER TYPES
Draw QR Code In Visual Basic .NET
Using Barcode generator for .NET framework Control to generate, create QR Code JIS X 0510 image in Visual Studio .NET applications.
Code 128A Creation In None
Using Barcode creator for Software Control to generate, create Code 128 Code Set B image in Software applications.
[CHAP. 2
GS1 - 12 Generation In None
Using Barcode generator for Software Control to generate, create UPC A image in Software applications.
DataMatrix Drawer In None
Using Barcode generator for Software Control to generate, create Data Matrix image in Software applications.
In the first run, d is positive and n%d is zero, so the compound condition is true. In the second run, is positive but n%d is not zero, so the compound condition is false.
Generate GS1 - 13 In None
Using Barcode creator for Software Control to generate, create GTIN - 13 image in Software applications.
UCC.EAN - 128 Creation In None
Using Barcode printer for Software Control to generate, create UCC.EAN - 128 image in Software applications.
In the third run, d is zero, so the compound condition is immediately determined to be false without evaluating the second component n%d = = 0". This short-circuiting prevents the program from crashing because when d is zero the expression n%d cannot be evaluated.
GTIN - 14 Drawer In None
Using Barcode printer for Software Control to generate, create ITF14 image in Software applications.
UCC - 12 Creation In Java
Using Barcode encoder for BIRT Control to generate, create EAN128 image in BIRT reports applications.
2.8 BOOLEAN EXPRESSIONS A boolean expression is a condition that is either true or false. In the previous example the expressions d > 0, n%d == 0, and (d > 0 &SC n%d == o > are boolean expressions. As we have seen, boolean expressions evaluate to integer values. The value 0 means false and every nonzero value means true. Since all nonzero integer values are interpreted .as meaning true, boolean expressions are often disguised. For example, the statement
Printing UPCA In .NET Framework
Using Barcode encoder for Reporting Service Control to generate, create UPC-A image in Reporting Service applications.
Barcode Encoder In None
Using Barcode creation for Office Word Control to generate, create barcode image in Office Word applications.
if (n) tout CC "n is not zero";
Recognize Barcode In VS .NET
Using Barcode Control SDK for ASP.NET Control to generate, create, read, scan barcode image in ASP.NET applications.
EAN13 Encoder In None
Using Barcode maker for Online Control to generate, create EAN13 image in Online applications.
will print n is not zero precisely when n is not zero because that is when the boolean expression (n > is interpreted as true . Here is a more realistic example:
ANSI/AIM Code 128 Generator In None
Using Barcode drawer for Font Control to generate, create Code 128C image in Font applications.
DataMatrix Encoder In Visual C#.NET
Using Barcode drawer for .NET Control to generate, create Data Matrix ECC200 image in VS .NET applications.
if (n%d) tout CC "n is not a multiple of d ;
The output statement will execute precisely when n%d is not zero, and that happens precisely when d does not divide n evenly, because n%d is the remainder from the integer division. The fact that boolean expressions have integer values can lead to some surprising anomalies in C++. For example, the following line might be written by a novice C++ programmer:
if (x >= y >= z) tout CC "max = x";
// E R R O R !
Obviously, the programmer intended to write
if (x >= y &SC y >= z) tout CC max = xl ; // OK
The problem is that the erroneous line is syntactically correct, so the compiler will not catch the error. In fact, the program could run without any apparent error at all. This is a run-time error of the worst kind because there is no clear indication that anything is wrong. The source of the difficulty described here is the fact that boolean expressions have numeric values. Suppose that x and Y both have the. value 0 and that z has the value 1. The expression ( x > = Y >= z > is evaluated from left to right. The first part x >= Y evaluates to true which is the numeric value 1. Then that is compared to Z, and since they are equal the complete expression evaluates to true even though it is really false! The moral here is to remember that boolean expressions have numeric values, and that compound conditionals can be tricky. Another error that novice C++ programmers are prone to make is using a single equals sign = when the double equals sign == should be. For example,
if (x = 0) tout << "X = 0";
// E R R O R !
Obviously, the programmer intended to write
if (x == 0) tout << "x = 0"; // OK
The erroneous statement will first assign 0 to x. That assignment then has the value 0 which means false so the tout statement will not be executed. So even if x originally was zero, it will not be printed. Worse, if x originally was not zero, it will inadvertently be changed to zero! Like the previous bug, this is another run time error of the worst kind. It is very difficult to detect.
Copyright © OnBarcode.com . All rights reserved.