\begin{minipage}[t]{8in}
\begin{tabular}{ll}
Graph*   & graph\_name
\end{tabular}\\
 
 \parbox[b]{2in} \ \ 
\begin{minipage}[t]{4in}Since graph is an abstract class,
only pointers to this class can be declared.\end{minipage}
\end{minipage}
\vspace{0.2in}


\begin{minipage}[t]{8in}
\begin{tabular}{ll}
UGraph  & ubingraph\_name()
\end{tabular}\\
 
 \parbox[b]{2in} \ \ 
\begin{minipage}[t]{4in}Create an undirected binary graph.\end{minipage}
\end{minipage}
\vspace{0.2in}

\begin{minipage}[t]{8in}
\begin{tabular}{ll}
MGraph  & mbingraph\_name()
\end{tabular}\\
 
 \parbox[b]{2in} \ \ 
\begin{minipage}[t]{4in}Create a mixed binary graph.\end{minipage}
\end{minipage}
\vspace{0.2in}

\begin{minipage}[t]{8in}
\begin{tabular}{ll}
DGraph  & dbingraph\_name()
\end{tabular}\\
 
 \parbox[b]{2in} \ \ 
\begin{minipage}[t]{4in}Create a directed binary graph.\end{minipage}
\end{minipage}
\vspace{0.2in}


\begin{minipage}[t]{8in}
\begin{tabular}{ll}
UHyperGraph  & hypergraph\_name()
\end{tabular}\\
 
 \parbox[b]{2in} \ \ 
\begin{minipage}[t]{4in}Create a hypergraph.\end{minipage}
\end{minipage}
\vspace{0.2in}

\begin{minipage}[t]{8in}
\begin{tabular}{ll}
DHyperGraph  & dhypergraph\_name()
\end{tabular}\\
 
 \parbox[b]{2in} \ \ 
\begin{minipage}[t]{4in}Create a directed hypergraph.\end{minipage}
\end{minipage}
\vspace{0.2in}

\begin{minipage}[t]{8in}
\begin{tabular}{ll}
MHyperGraph  & mhypergraph\_name()
\end{tabular}\\
 
 \parbox[b]{2in} \ \ 
\begin{minipage}[t]{4in}Create a mixed hypergraph.\end{minipage}
\end{minipage}
\vspace{0.2in}


\begin{minipage}[t]{8in}
\begin{tabular}{ll}
Graph*  & LoadGraph(char*f)
\end{tabular}\\
 
	
 \parbox[b]{2in} \ \ 
\begin{minipage}[t]{4in}Load and return the graph stored in file f.\end{minipage}
\end{minipage}
\vspace{0.2in}


\begin{minipage}[t]{8in}
\begin{tabular}{ll}
int  & SaveGraph(Graph*g, char*f)
\end{tabular}\\
 
	
 \parbox[b]{2in} \ \ 
\begin{minipage}[t]{4in}Save graph g in file f. Return nonzero if an error is encountered.\end{minipage}
\end{minipage}
\vspace{0.2in}