const int *p = new const int(128);

delete p;

int num;

... //读取配置文件，并将配置数据填充到num

const int *pNum = new const int(num); // 用num初始化const对象

cout<<*pNum<<endl; //使用const对象

...

delete pNum;

int num;

... //获取num的值

const int *pNum = new const int(num); // 用num初始化const对象

unsigned char _data[*pNum]; //创建数组

...

delete pNum

#include <iostream>

using namespace std;

int main()
{
  int num;
  cin>>num;
  const int *pNum = new const int(num);
  int arr[*pNum];
  for(int i=0;i<*pNum;++i) arr[i] = i;
  for(int i=0;i<*pNum;++i) cout<<arr[i]<<" ";
  cout<<endl;
  return 0;
}