构造函数简单示意

#include <iostream>  
using namespace std;  

class A{
public:
	A();	
};

A::A()
{
	cout << "call A()" << endl;
}

int main()
{
	A a1;
	A a[3];
	
	A* p1 = new A;
	A* p2 = new A[3];
	
	delete p1;
	delete[] p2;
	
	return 0;
}