动态内存分配

#include <iostream>
using namespace std;

int main()
{
	int *p;
	int n;

	cout << "input a num" << endl;
	cin >> n;
	p = new int[n];

	cout << "input" << n << "num" << endl;

	for (int i=0; i<n; i++)
		cin >> p[i];

	for (int j=0; j<n; j++)
		cout << p[j] << endl;

	delete[] p;
	p = NULL;

	return 0;
}