php实现栈操作

xiaoxiao2025-04-05 25

<?php class MyStack{ private $top = -1;//默认-1，表示该栈为空 private $maxSize = 5;//表示栈的最大容量 private $stack = array(); //入栈操作 public function push($val){ //判断栈是否已满 if($this->top == $this->maxSize - 1){ echo '栈满！'; return; } $this->top ++; $this->stack[$this->top] = $val; } //出栈操作 public function pop(){ //判断是否栈空 if($this->top == -1){ echo '栈空'; return; } //取出栈顶的值 $topVal = $this->stack[$this->top]; $this->top --; return $topVal; } }

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