\newenvironment{FRAME}{\begin{trivlist}\item[]
  \hrule
  \hbox to \linewidth\bgroup
  \advance\linewidth by -30pt
  \hsize=\linewidth
  \vrule\hfill
  \vbox\bgroup
    \vskip15pt
    \def\thempfootnote{\arabic{mpfootnote}}
    \begin{minipage}{\linewidth}}{%
    \end{minipage}\vskip15pt
  \egroup\hfill\vrule
 \egroup\hrule
\end{trivlist}}

\newcommand{\yenn}{{\ooalign{Y\crcr\hss=\hss}}}
\def\blskip{\vskip\baselineskip}

%%%%%%%%%%%%%%%%%  macro definitions %%%%%%%%%%%%%%%%%%%%%
\def\QQQ{\fbox{{\bf 質問}}}
\def\AAA{{\fbox{\bf 答え}}}
\def\HHH{{\fbox{\bf 発展学習}}}
\newtheorem{problem}{\fbox{問題}}[chapter]
\newtheorem{answer}{答え}[chapter]
\newtheorem{program}{プログラム}[chapter]
\newtheorem{experiment}{実験}[chapter]
\newtheorem{example}{\fbox{例}}[chapter]
\newtheorem{exampleOutput}{出力例}[chapter]
\newtheorem{exampleInput}{入力例}[chapter]
\newtheorem{exampleInputOutput}{入出力例}[chapter]
\newtheorem{question}{疑問}[chapter]
\newtheorem{theorem}{定理}[chapter]
\newtheorem{remark}{注意}[chapter]
\newtheorem{algorithm}{アルゴリズム}[chapter]
\def\Begin{
  \rm
}
\def\END{
  \par \bigbreak
} 
\def\command#1{
 \fbox{\tt ALT}{\tt +}\fbox{\tt #1}
}
\def\alt#1{
 \fbox{\tt ALT}{\tt +}\fbox{\tt #1}
}
\def\shift#1{
 \fbox{\tt SHIFT}{\tt +}\fbox{\tt #1}
}
\def\command#1{
 \fbox{\tt COMMAND}{\tt +}\fbox{\tt #1}
}
\def\ctrl#1{
 \fbox{\tt CTRL}{\tt +}\fbox{\tt #1}
}
\def\esc#1{
 \fbox{\tt esc} \fbox{\tt #1}
}
\def\return{
 \fbox{\tt RETURN}
}
\def\expr{
 {\it expr}
}
\def\poly{
 {\it poly}
}
\def\f{
 {\it f}
}
\def\range{
 {\it \{ x, xmin, xmax \}}
}
\def\power{
\verb+^+}
\def\file{
 ファイル名
}