A modified JHW document class for Homework assignments

example.tex

\documentclass{jhwhw}

\author{Christopher S. Corley}
\title{Class homework solutions}
\date{October 19, 2011}

\begin{document}
\problem{Some problem name}
    blahblah
\solution
    solution time!

\problem{}
    blahblaheawrawer
\solution
    \part
    solution time!
    \part
    solution time!


\end{document}

jhwhw.cls

%=====================================================================
% jhwhw.cls
% Provide jhwhw.cls class
%=====================================================================

%=====================================================================
% Identification
%=====================================================================
\NeedsTeXFormat{LaTeX2e}
\ProvidesClass{jhwhw}[2009/02/11 Justin Wilson's Homework Class]

\LoadClass[letterpaper, 12pt]{report}
%\RequirePackage{jhwmath} Personal style file I use.

\RequirePackage{fancyhdr}
\RequirePackage[top=1in,bottom=1in,left=1in,right=1in]{geometry}
\RequirePackage{graphicx}
\RequirePackage{empheq}
\RequirePackage{ifthen}
%\RequirePackage{jhwgraphics} Another personal style file I use.


%=====================================================================
% Commands
%=====================================================================

  \setlength{\headheight}{15pt}
  \lhead{\@author}\chead{\@title}\rhead{\@date}
  \lfoot{}\cfoot{\thepage}\rfoot{}
  \pagestyle{fancy}

\ifx\pdfoutput\undefined                         %LaTeX
  \RequirePackage[ps2pdf,bookmarks=true]{hyperref}
  \hypersetup{ %
    pdfauthor   = {\@author},
    pdftitle    = {\@title},
    pdfcreator  = {LaTeX with hyperref package},
    pdfproducer = {dvips + ps2pdf}
  }
\else                                            %PDFLaTeX
  \RequirePackage[pdftex,bookmarks=true]{hyperref}
  \hypersetup{ %
    pdfauthor   = {\@author},
    pdftitle    = {\@title},
    pdfcreator  = {LaTeX with hyperref package},
    pdfproducer = {dvips + ps2pdf}
  }
\pdfadjustspacing=1
\fi

% Set up counters for problems and subsections

\newcounter{ProblemNum}
\newcounter{SubProblemNum}[ProblemNum]
\newcounter{SubSubProblemNum}[SubProblemNum]

\renewcommand{\theProblemNum}{\arabic{ProblemNum}}
\renewcommand{\theSubProblemNum}{\alph{SubProblemNum}}
\renewcommand{\theSubSubProblemNum}{\roman{SubSubProblemNum}}

\newcommand*{\anyproblem}[1]{\newpage\subsection*{#1}}
\newcommand*{\anyproblemnb}[1]{\subsection*{#1}}
\newcommand*{\problem}[1]{\stepcounter{ProblemNum} %
   \anyproblem{Problem \theProblemNum. \; #1}}
\newcommand*{\problemnb}[1]{\stepcounter{ProblemNum} %
   \anyproblemnb{Problem \theProblemNum. \; #1}}
\newcommand*{\soln}[1]{\subsubsection*{#1}}
\newcommand*{\solution}{\soln{Solution}}
\renewcommand*{\part}{\stepcounter{SubProblemNum} %
  \soln{Part (\theSubProblemNum)}}

\newcommand*{\subpart}{\stepcounter{SubSubProblemNum} %
  \soln{Subpart \theSubSubProblemNum. }}

\renewcommand{\theenumi}{(\alph{enumi})}
\renewcommand{\labelenumi}{\theenumi}
\renewcommand{\theenumii}{\roman{enumii}}

% \def\problemmark{}

% % Typesetting problems

% % \newcommand*{\prob}[1]{\newpage \noindent \textbf{\Large #1}}
% % \newcommand*{\problem}[1]{\stepcounter{ProblemNum} \prob{Problem %
% % \theProblemNum.}}
% % \newcommand*{\soln}[1]{\\ \noindent \textbf{\Large #1}}
% % \newcommand*{\solution}{\soln{Solution}}
% % \renewcommand*{\part}{\\ \noindent \stepcounter{SubProblemNum} %
% % \textbf{\Large Part (\theSubProblemNum)}}

% \newcommand\problem{\@startsection{problem}{1}{\z@}%
%                      {-3.25ex \@plus -1ex \@minus -.2ex}%
%                      {1.5ex \@plus .2ex}%
%                      {\normalfont\large\bfseries}}