4.2 Item Selection Statements"Teacher, did I pass the level four exam?" ”If the teacher is asked this question, how will he answer? Yes, he will choose different answers according to different conditions:If the test result is greater than or equal
4.2 Item Selection Statements"Teacher, did I pass the level four exam?" ”If the teacher is asked this question, how will he answer? Yes, he will choose different answers according to different conditions:If the test result is greater than or equal
Simplified condition expression 1. Decompose Conditional decomposition condition expression
You have a complex conditional statement.Separate independent functions from the if, then, and else sections..
Among programs, complex conditional logic is
Program flow control Statements in Java include conditional structure, loop structure, and jump statements4.1-Piece structureThe conditional structure includes the sequential structure and the selection structure. The sequential structure does not
3 forms of an IF statement
1 an if (expression) statement.
For example:
if (x>y) cout
The execution of this if statement is shown in the following figure.
2 if (expression) statement 1 Else Statement 2
For example:
if (x>y)
Conditional compilation and c ++ Conditional compilation
1. ifdef
#ifdef XXXXX......#endifIf XXXXX is defined, compile the above Code.
2. ifndef
#ifndef XXXXX......#endifIf XXXXX is not defined, compile the above Code.
3. if
#if
Overview#if/#endif statements are commonly used to generate different compilation results based on the same source code, the most common of which is the debug and release versions. However, these tools are not very friendly in practical applications
Conditional compilation is C # more than Java, but I consulted with seniors, they said conditional compilation in the actual project development is not used. The following is just a record of the steps, the need for small partners can refer to. Step
Conditional comments work as follows:
Copy codeThe Code is as follows: Special instructions for IE 6 here
[Code]
Their basic structure is the same as an HTML comment (). Therefore all other browsers will see them as normal comments and will
Mind Mapping
Click on the image below to view the larger image.
Introduced
Conditional logic can be very complex, so this chapter provides some refactoring techniques that are designed to simplify them.
Full
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