我有一个 C++ 运算符优先级表，它导致了错误。
据我所知，第 9 行有问题，但我不明白为什么 [] 不能正确地转义 []
我确信存在很多错误，因此，任何修复都将不胜感激。
\input{preamble.tex}
\begin{document}
\mainmatter
\begin{tabular}{l|l|l|l}
Precedence & Operator & Description & Associativity \\
1 & :: & Scope resolution & Left-to-right \\
2 & ++ -- \\
\(\) Function call \\
\[\] Array subscripting \\
. Element selection by reference \\
\-> Element selection through pointer \\
& postincrement and decrement & type\(\) type\{\} Function-style type cast \\
3 & ++ -- \\
+ - Unary plus and minus \\
! ~ Logical NOT and bitwise NOT \\
(type) C-style type cast \\
* Indirection (dereference) \\
\& Address-of \\
sizeof \\
new \\
delete
& Preincrement and decrement & Right-to-left \\
4 & .* ->* & Pointer to member & Left-to-right \\
5 & * / \% & Multiplication, division, and remainder \\
6 & + - & Addition and subtraction \\
7 & << >> & Bitwise left shift and right shift \\
8 & < <=
> >=
& Relational operators \\
Relational operators > ≥ respectively \\
9 & == != & For relational = and ≠ respectively \\
10 & \& & Bitwise AND \\
11 & ^ & Bitwise XOR \\
12 & | & Bitwise OR \\
13 & \&\& & Logical AND \\
14 & || & Logical OR \\
15 & ?:
throw
= Direct assignment (provided by default for C++ classes)
+= -= Assignment by sum and difference
*= /= \%= Assignment by product, quotient, and remainder
<<= >>= Assignment by bitwise left shift and right shift
\&= ^= |= Assignment by bitwise AND, XOR, and OR
& Ternary & Right-to-left \\
16 & , & Comma & Left-to-right
\end{tabular}
\end{document}
当我去掉括号上的反斜杠时，第 9 行仍然出现错误：
! 缺少数字，视为零。} l.9 [] 数组下标 \ ? ! 非法计量单位（插入 pt）。
新的（精简的）代码是：
\input{preamble.tex}
\begin{document}
\mainmatter
\begin{tabular}{l|l|l|l}
Precedence & Operator & Description & Associativity \\
1 & :: & Scope resolution & Left-to-right \\
2 & ++ -- \\
() Function call \\
[] Array subscripting \\
. Element selection by reference \\
-> Element selection through pointer \\
& postincrement and decrement & Function-style type cast \\
好的，给出了答案，我对表格进行了大量清理，包括使其独立，以便任何人都可以复制它来学习。
\documentclass{standalone}
\begin{document}
%\tiny
%\begin{tabular}{l|l|l|l}
\begin{tabular}{llll}
{\huge Precedence} & {\huge Operator} & {\huge Description} & {\huge Associativity} \\ \hline
1 & \verb$::$ & Scope resolution & Left-to-right \\
2 & \verb$++$ \verb$--$ & pre-increment and decrement & \\ \hline
& \verb$()$ & Function call & \\
& \verb$[]$ & Array subscripting & \\
& \verb$.$ & Object member & \\
& \verb$->$ & Element selection through pointer \\
& \verb$()$ & Function-style type cast \\ \hline
3 & \verb$++$ \verb$--$ & post-increment and decrement & Right-to-left \\
& \verb$+$ \verb$-$ & Unary plus and minus \\
& \verb$!$ \verb$~$ & Logical NOT and bitwise NOT \\
& (type) & C-style type cast \\
& \verb$*$ & Pointer dereference \\
& \verb$&$ & Address-of \\
& sizeof & The number of atomic units of memory used \\
& new & dynamic memory allocation \\
& delete & dynamic memory deallocation \\
4 & \verb$.*$ \verb$->*$ & Pointer to member & Left-to-right \\ \hline
5 & \verb$*$ \verb$/$ \verb+\%+ & Multiplication, division, and remainder \\ \hline
6 & \verb$+$ \verb$-$ & Addition and subtraction \\ \hline
7 & \verb$<<$ \verb$>>$ & Bitwise left shift and right shift \\ \hline
8 & \verb$<$ \verb$<=$ & Relational operators \verb$>$ \verb$≥$ \\
& \verb$>$ \verb$>=$ & Relational operators \verb$\greaterequal$ \verb$≥$ \\ \hline
9 & \verb$==$ \verb$!=$ & Relational equality and inequality \verb$≠$ \\ \hline
10 & \verb$&$ & Bitwise AND \\ \hline
11 & \verb$^$ & Bitwise XOR \\ \hline
12 & \verb$|$ & Bitwise OR \\ \hline
13 & \verb$&&$ & Logical AND \\ \hline
14 & \verb$||$ & Logical OR \\ \hline
15 & \verb$?:$ & ternary & Right-to-left \\
& throw & throw an exception \\
& \verb$=$ & assignment \\
& \verb$+=$ \verb$-=$ & additive assignment \\
& \verb$*=$ \verb$/=$ \verb$\%=$ & Multiplicative assignment \\
& \verb$<<=$ \verb$>>=$ & Bitwise left shift and right shift assignment \\
& \verb$\&=$ \verb$^=$ \verb$|=$ & Bitwise AND, XOR, and OR assignment \\ \hline
16 & \verb$,$ & Comma & Left-to-right \\
\end{tabular}
\end{document}
答案1
我建议你使用 inline verbatim 命令来显示所有特殊运算符。代码如下，当你编译它时你会发现它非常丑陋。而且你有很多内容错误需要修复，但这不是 C++ 编程论坛。
\documentclass{standalone}
\begin{document}
\tiny
\begin{tabular}{l|l|l|l}
Precedence & Operator & Description & Associativity \\
1 & \verb+::+ & Scope resolution & Left-to-right \\
2 & \verb-++- \verb+--+ && \\
\verb+()+ Function call &&& \\
\verb+[]+ Array subscripting &&& \\
\verb+.+ Element selection by reference &&& \\
\verb+->+ Element selection through pointer &&& \\
& postincrement and decrement & type\(\) type\{\} Function-style type cast \\
3 & \verb-++- \verb+--+ \\
\verb-+- \verb+-+ Unary plus and minus \\
\verb+!+ \verb+~+ Logical NOT and bitwise NOT \\
(type) C-style type cast \\
\verb+*+ Indirection (dereference) \\
\verb+&+ Address-of \\
sizeof \\
new \\
delete
& Preincrement and decrement & Right-to-left \\
4 & \verb+.* \verb+->* & Pointer to member & Left-to-right \\
5 & \verb+*+ \verb+/+ \verb+\%+ & Multiplication, division, and remainder \\
6 & \verb-+- \verb+-+ & Addition and subtraction \\
7 & \verb+<<+ \verb+>>+ & Bitwise left shift and right shift \\
8 & \verb+<+ \verb+<=+
\verb+>+ \verb+>=+
& Relational operators \\
Relational operators \verb+> \verb+≥+ respectively \\
9 & \verb+==+ \verb+!=+ & For relational \verb+=+ and \verb+≠+ respectively \\
10 & \verb+\+ & & Bitwise AND \\
11 & \verb+^+ & Bitwise XOR \\
12 & \verb+|+ & Bitwise OR \\
13 & \verb+&&+ & Logical AND \\
14 & \verb+||+ & Logical OR \\
15 & \verb+?:+
throw
\verb+=+ &Direct assignment (provided by default for C++ classes)\\
\verb-+=- \verb+-=+& Assignment by sum and difference\\
\verb+*=+ \verb+/=+ \verb+\%=+ & Assignment by product, quotient, and remainder\\
\verb+<<=+ \verb+>>=+ &Assignment by bitwise left shift and right shift\\
\verb+\&=+ \verb+^=+ \verb+|=+ & Assignment by bitwise AND, XOR, and OR\\
& Ternary & Right-to-left \\
16 & \verb+,+ & Comma & Left-to-right\\
\end{tabular}
\end{document}
答案2
你有很多错误在你的代码中。
首先，某些字符具有特殊含义。您使用过的字符包括^、&、~和\。对于这些字符，您需要使用特殊控制字符和宏。
\^{} for `^`
\& for `&`
\backslash for `\`
$\sim$ for `~`
该字符^在数学模式下用于创建上标。
该字符&有多种用途。表中的此字符标记了列之间的边界。
字符\后跟空格会形成空格。
字符~与 类似\，但是它创建的空白不会跨行或跨页边界。
如果您要排版计算机语言，您可能需要查看该listings包。