\documentclass{report}
\usepackage{graphicx}
\usepackage[mathscr,mathcal]{eucal}
\usepackage{tikz}
\usepackage{subfigure}

\begin{document}


 \begin{figure}[!htp]
\centering

\subfigure[$Q_{1}(V_{1}, V-V_{1},E_{1})$]{
\begin{tikzpicture}
\filldraw [black]
(0,0) circle (2pt)
(1,1) circle (2pt)
(-1,1) circle (2pt);
\draw (0,0)-- (-1,1);\draw (1,1)-- (-1,1);
\node[below] at(0,0) {$c$};\node[right] at(1,1) {$b$};\node[left] at(-1,1) {$a$};
\end{tikzpicture}
   \label {fig4}
}
\hspace*{30mm}
\subfigure[$Q_{2}(V_{2},\acute{ V}-V_{2},E_2)$]{
\begin{tikzpicture}
\filldraw [black]
(0,0) circle (2pt)
(1,1) circle (2pt)
(-1,1) circle (2pt)
(0,2) circle (2pt);
\draw (0,0)-- (-1,1);\draw (0,0)-- (0,2);\draw (1,1)-- (0,2);\draw (-1,1)-- (0,2);
\node[below] at(0,0) {$3$};\node[right] at(1,1) {$2$};\node[left] at(-1,1) {$0$};\node[above] at(0,2) {$1$};
\end{tikzpicture}
 \label{fig5}
}
\caption{$   $}
\label{fig 5}

\end{figure}






\end{document}
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