为什么会出现“缺失数字，视为零”的错误？

Question

您没有向我们展示哪个命令会引发“缺失数字”错误。

对我来说很明显你使用的是旧版本的类moderncv。当前版本是moderncv 2015/07/28 v2.0.0 modern curriculum vitae and letter document class。

通过以下更正并添加一些虚拟信息，我可以进行编译而不会出现任何错误。

平均能量损失

\documentclass[11pt,a4paper]{moderncv}

% moderncv themes
%\moderncvtheme[blue]{casual}                 % optional argument are 'blue' (default), 'orange', 'red', 'green', 'grey' and 'roman' (for roman fonts, instead of sans serif fonts)
\moderncvtheme[blue]{classic}                    % idem

% character encoding
\usepackage[utf8]{inputenc}     % to print ä ö ü

% adjust the page margins
\usepackage[scale=0.85]{geometry}
\setlength{\hintscolumnwidth}{3cm}                      % if you want to change the width of the column with the dates
%\AtBeginDocument{\setlength{\maketitlenamewidth}{9cm}}  % only for the classic theme, if you want to change the width of your name placeholder (to leave more space for your address details
\AtBeginDocument{\setlength{\makecvheadnamewidth}{9cm}}
\AtBeginDocument{\recomputelengths}                     % required when changes are made to page layout lengths


% Define \cvdoublecolumn, which sets its arguments in two columns without any labels

\newcommand{\cvdoublecolumn}[2]{%
    \cvitem[0.75em]{}{%
        \begin{minipage}[t]{\listdoubleitemmaincolumnwidth}#1\end{minipage}%
        \hfill%
        \begin{minipage}[t]{\listdoubleitemmaincolumnwidth}#2\end{minipage}%
    }%
}

% usage: \cvreference{name}{address line 1}{address line 2}{address line 3}{address line 4}{e-mail address}{phone number}
% Everything but the name is optional
% If \addresssymbol, \emailsymbol or \phonesymbol are specified, they will be used.
% (Per default, \addresssymbol isn't specified, the other two are specified.)
% If you don't like the symbols, remove them from the following code, including the tilde ~ (space).

\newcommand{\cvreference}[8]{%
    \textbf{#1}\newline% Name
    \ifthenelse{\equal{#2}{}}{}{\addresssymbol~#2\newline}%
    \ifthenelse{\equal{#3}{}}{}{#3\newline}%
    \ifthenelse{\equal{#4}{}}{}{#4\newline}%
    \ifthenelse{\equal{#5}{}}{}{#5\newline}%
    \ifthenelse{\equal{#6}{}}{}{\emailsymbol~\texttt{#6}\newline}%
    \ifthenelse{\equal{#7}{}}{}{\phonesymbol~#7\newline}%
    \ifthenelse{\equal{#8}{}}{}{\mobilephonesymbol~#8}
}



%---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------


\makeatletter
\renewcommand*{\bibliographyitemlabel}{\@biblabel{\arabic{enumiv}}}
\makeatother

% bibliography with mutiple entries
%\usepackage{multibib}
%\newcites{book,misc}{{Books},{Others}}

%\nopagenumbers{}                             % uncomment to suppress automatic page numbering for CVs longer than one page
%----------------------------------------------------------------------------------
%            content
%----------------------------------------------------------------------------------

\name{John}{Doe}
\title{CV}
\address{street and number}{postcode city}
\mobile{+1~(234)~567~890}
\phone{+2~(345)~678~901}
\fax{+3~(456)~789~012}
\email{[email protected]}
\homepage{www.johndoe.com}


\begin{document}
\maketitle


\section{Personal Information}

\section{Personal Statement}

\section{Masters Thesis}

\section{Professional Experience}

\section{Project Experience}
\section{Technical Skills}
\section{Web Links}
\section{References}
\end{document}

参见更改后的行\AtBeginDocument{\setlength{\makecvheadnamewidth}{9cm}}。新版本maketitlenamewidth必须按照所示进行更改。

参见之前添加的虚拟信息\begin{document}。

结果：

Answer 1