多选题

以下正确的shell函数声明并且成功调用的是:

Question

A. <div>function func(){<br> echo &quotSuccess&quot<br>}<br>func()</div>

B. <div>func(){<br> echo &quotSuccess&quot<br>}<br>func()</div>

C. <div>function func(){<br> echo &quotSuccess&quot<br>}<br>func</div>

D. <div>func(){<br> echo &quotSuccess&quot<br>}<br>func</div>