输入一个整数n,输出一个n行的三角形图形。

<span><span>&nbsp;</span><span>&nbsp;</span></span><span style="font-family:宋体;">输入</span><span>3</span> 

<span></span><span style="font-family:宋体;">输出</span> 

<span style="font-family:宋体;"></span><span>@</span>

<span><span></span></span><span>@@</span>

<span><span></span></span><span>@@@</span>

<span></span>

<span></span>

<span style="font-family:宋体;"></span>&nbsp;

<span style="font-family:宋体;">输入</span><span>5</span> 

<span style="font-family:宋体;">输出</span> 

<span>@&nbsp;</span>

<span><span></span></span><span>@@</span>

<span><span></span></span><span>@@@</span>

<span><span></span></span><span>@@@@</span>

<span style="font-family:'Times New Roman';font-size:10.5pt;"></span>&nbsp;

四年级题目-双重循环练习题