SymbolicC`
SymbolicC`

CPreprocessorIfndef

CPreprocessorIfndef[cond]

is a symbolic representation of a preprocessor ifndef conditional.

CPreprocessorIfndef[cond,true,false]

represents the true and false cases.

更多信息和选项

  • SymbolicC expressions are inert; they evaluate to themselves, staying in an unevaluated form.
  • SymbolicC expressions can be converted into a C string with ToCCodeString.

范例

基本范例  (1)

To use SymbolicC you first need to load the package:

This creates a preprocessor if conditional directive:

This creates an entire if/else/endif set of statements:

This adds a comment to the if directive:

Wolfram Research (2010)，CPreprocessorIfndef，Wolfram 语言函数，https://reference.wolfram.com/language/SymbolicC/ref/CPreprocessorIfndef.html.

文本

Wolfram Research (2010)，CPreprocessorIfndef，Wolfram 语言函数，https://reference.wolfram.com/language/SymbolicC/ref/CPreprocessorIfndef.html.

CMS

Wolfram 语言. 2010. "CPreprocessorIfndef." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/SymbolicC/ref/CPreprocessorIfndef.html.

APA

Wolfram 语言. (2010). CPreprocessorIfndef. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/SymbolicC/ref/CPreprocessorIfndef.html 年

BibTeX

@misc{reference.wolfram_2024_cpreprocessorifndef, author="Wolfram Research", title="{CPreprocessorIfndef}", year="2010", howpublished="\url{https://reference.wolfram.com/language/SymbolicC/ref/CPreprocessorIfndef.html}", note=[Accessed: 17-November-2024 ]}

BibLaTeX

@online{reference.wolfram_2024_cpreprocessorifndef, organization={Wolfram Research}, title={CPreprocessorIfndef}, year={2010}, url={https://reference.wolfram.com/language/SymbolicC/ref/CPreprocessorIfndef.html}, note=[Accessed: 17-November-2024 ]}