Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
How many preprocessor directives can appear on a single line.
|
One
|
Sometimes it's lonely.
|
|
|
What is the #if directive for?
|
The #if tests a conditional statement. If the statement evaluates to 'true' then all statements between the #if and #endif statements are compiled.
|
|
|
|
What comparison operators can be used with the #if directive?
|
==
!= && || |
There are only 4.
|
|
|
What other preprocessor directives are used with #if?
|
#else
#elif #endif #define #undef |
There are 5.
|
|
|
What is the #else preprocessor directive used for?
|
The #else preprocessor directive is used to create an alternate compile path in the case that #if preprocessor directive evaluates to false.
|
|
|
|
What preprocessor directive must follow #else?
|
The #endif preprocessor directive must be the next preprocessor directive after #else.
|
|
|
|
What is the #elif directive used for?
|
The #elif preprocessor directive allow more complex compile stream logic to be expressed more simply than by nesting #if ... #else ... #endif sequences. #elif accepts that same operators that #if accepts. It must be nested within a #if ... #endif sequence. It is equivalent to using a #else ... #if sequence.
|
|
|
|
What is the #endif preprocessor directive used for?
|
The #endif preprocessor directive is used to terminate an #if block.
|
|
|
|
What is the #define preprocessor directive used for?
|
It is used to define a symbol that can be evaluated by the #if, #elif preprocessor directive. You can also use the [Conditional("foo")] attribute to control compilation.
|
|
|
|
What is the preprocessor directive #undef used for?
|
To undefine an existing symbol, typically defined using the /define compiler options.
|
|
|
|
What is the purpose of the #warning preprocessor directive?
|
The #warning preprocessor directive is used to output a message during the compile. Example:
#warning Node connections not yet tested. For example. |
|
|
|
What is the #error preprocessor directive used for?
|
The #error preprocessor directive is used to output an error message during the compile process.
#error this code section is not fully developed and should not be used. For example. |
|
|
|
What is the purpose of the #line preprocessor directive?
|
The #line preprocessor directive is used to assign a line number to the following line in the source code. It may also have "default" as an argument so that the line numbering is reset.
|
|
|
|
What is the purpose of the #region and #endregion preprocessor directives?
|
They are specific to the Visual Studio environment. They are used to create a block of code that can be expanded and collapsed. #region must be terminated by an #endregion preprocessor directive. Optionally the #region preprocessor directive may have be named. Example: #region myRegion for fun
|
|
