求教指针函数的有关问题

求教指针函数的问题
void Function(int* a, int* n){
if (a) delete[] (a);
a = new int[10];
memset(a, 0, 10*sizeof(int));
*n = 10;
}
void main(){
int* a = NULL;
int n = 0;
Function(a, &n);
for (int i=0; i<n; i++){
cout << "a[" << i << "]=" << a[i] << "\n";
}
if (a) delete[] a;
结果是要输出i个0，上面的输不出，除了下面的修改方法之外，还有其他什么不算太复杂的改法吗...老师叫再想两种，求赐教！


void Function(int** a, int* n){
if (*a) delete[] (*a);
(*a) = new int[10];
memset((*a), 0, 10*sizeof(int));
*n = 10;
}
void main(){
int* a = NULL;
int n = 0;
Function(&a, &n);
for (int i=0; i<n; i++){
cout << "a[" << i << "]=" << a[i] << "\n";
}
if (a) delete[] a;
}


------解决方案--------------------

C/C++ code

#include <iostream>

using namespace std;

int *Function(int* a, int* n){
    if (a) delete[] (a);
    a = new int[10];
    memset(a, 0, 10*sizeof(int));
    *n = 10;

    return a;
    }

void main()
{
    int* a = NULL;
    int n = 0;
    a=Function(a, &n);
    for (int i=0; i<n; i++){
        cout << "a[" << i << "]=" << a[i] << "\n";
    }
    if (a) delete[] a;
}