C++问题，有关异常处理与动态内存管理

以下程序，用来进行动态数组的内存异常管理，有颜色部分好像有问题，无论怎样p都释放不掉，即使在主函数中加入绿色的一行来替换Delete函数也不行，这是怎么回事。还有，想故意让申请内存不成功要怎么办呢，貌似那样直接就被系统给中止了，那我编的处理函数要怎么才能被调用呢。

#include<iostream>

using namespace std;

int* New(int n)

{

       int *p;

       if((p=new int[n])==NULL) throw 1;

       return p;

}

void Delete(int *&p)

{

       cout<<p<<endl;

       if(p==NULL) throw 1.1;

       delete []p;

       cout<<p<<endl;

}

int GetValue(int i,int a[],int n)

{

       if(i<0) throw ‘a’;

       if(i>n-1) throw “abc”;

       return a[i];

}

void main()

{

       bool flag=true;

       try

       {

              int *P,n,i;

              cout<<”Input the number of the members.”<<endl;

              cin>>n;

              P=New(n);

              for(i=0;i<n;i++)

                     P[i]=i+1;

              cout<<”Input the number of member that you want to know.”<<endl;

              cin>>i;

              cout<<GetValue(i-1,P,n)<<endl;

              cout<<P<<endl;

              Delete(P);

              delete []P;（注：此行与上一行二选一，都没能释放内存，请高手解释一下吧）

              //Delete(P);

       }

       catch(int)

       {

              cout<<”申请内存失败“<<endl;

              flag=false;

       }

       catch(double)

       {

              cout<<”内存释放错误“<<endl;

              flag=false;

       }

       catch(char)

       {

              cout<<”数组应用超过下界“<<endl;

              flag=false;

       }

       catch(char *)

       {

              cout<<”数组应用超过上界“<<endl;

              flag=false;

       }

       if(flag==false) cout<<”程序有错误，请校验“<<endl;

       else cout<<”运行成功！“<<endl;

       cout<<”EXIT…”<<endl;

       //cin>>flag;

}

运行结果：

Input the number of the members.

25

Input the number of member that you want to know.

10

10

00491C50

00491C50

运行成功！

EXIT…

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