c++实现对出栈合法性的检测

//Designed by st

//检查出栈的合法性  

#include <iostream>
#include <assert.h>
#include <stack>
using namespace std;
bool  _isLegal(int* _pushStack, int* _popStack, int len)
{
    if (_pushStack == NULL || _popStack == NULL || len <= 0)
    {
        exit(EXIT_FAILURE);
    }
    bool ret = false;