学习php 类，遇到一个基础问题，求好心人解答。
class ceshi {<br /> public function aaa($a) {<br /> $this->c = $a;<br /> $r = $this->bbb();<br /> echo $r;<br /> }<br /> public function bbb() {<br /> $c = $this->c + 1;<br /> return $c;<br /> }<br />}<br />$xyz = new ceshi;<br />$xyz->aaa(5);<br /><br />//使用类的属性<br />class ceshi {<br />private $c;<br /> public function aaa($a) {<br /> $this->c = $a;<br /> echo $this->bbb();<br /> }<br /> public function bbb() {<br /> return $this->c + 1;<br /> }<br />}<br />$xyz = new ceshi;<br />$xyz->aaa(5);<br /><br /><br /><br />class ceshi{<br /><br /> private $c;<br /><br /> public function aaa($a){<br /> $this->c = $a;<br /> $k = $this->bbb();<br /> echo $k;<br /> }<br /><br /> public function bbb(){<br /> $this->c = $this->c + 1;<br /> return $this->c;<br /> }<br />}<br /><br />$xyz = new ceshi;<br />$xyz->aaa(5);<br />
