此为 Mathematica 8 文档,内容基于更早版本的 Wolfram 语言
查看最新文档(版本11.1)

CPreprocessorIf

CPreprocessorIf[cond]
is a symbolic representation of a preprocessor if conditional.

represents the true and false cases.
  • SymbolicC expressions are inert; they evaluate to themselves, staying in an unevaluated form.
  • SymbolicC expressions can be converted into a C string with ToCCodeString.
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:
To use SymbolicC you first need to load the package:
In[1]:=
Click for copyable input
This creates a preprocessor if conditional directive:
In[2]:=
Click for copyable input
Out[2]=
This creates an entire if/else/endif set of statements:
In[3]:=
Click for copyable input
Out[3]=
This adds a comment to the if directive:
In[4]:=
Click for copyable input
Out[4]=