C++动态数组的实现

 #include <iostream>
 using namespace std;
 int main()
 {
     int n;
     while(cin>>n)
     {
         int *p=new int[n+];
         p[]=;
         p[]=;
         for(int i=;i<=n;i++)
         {
             p[i]=p[i-]+p[i-];
         }
     cout<<p[n]<<endl;
     }
     return ;
 }