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答案1
答案2
首先:
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[frenchb]{babel}
\usepackage[geometry]{ifsym}
\newenvironment{bproof}[1]
{
\noindent\textbf{Exmaple.} #1\\[5mm]
\FilledBigSquare
}
{
\FilledBigTriangleRight
}
\begin{document}
\begin{bproof}{Example name}
Example Body.
\end{bproof}
\\
\begin{bproof}{Example name 2}
Example Body.
Example Body.
\end{bproof}
\end{document}