下面我们看一个绘制好的例子：
代码实现如下：
\documentclass{standalone} \usepackage{tikz} \usetikzlibrary{backgrounds} \usepackage{graphicx} \pagenumbering{gobble} % Some customizable styles \tikzset { highlight/.style = {gray, opacity=0.3}, digit/.style = {minimum height = 5mm, minimum width=5mm, anchor=center }, circle/.style = {draw=black!80!black, dotted, very thick}, cross/.style = {red, opacity=.5, shorten >=1mm, shorten