重载new和delete后调用构造函数和析构函数顺序

#include <iostream>
using namespace std;
class C
{
float x,y;
public:
C(){
cout<<"调用构造函数"<<endl;
}
~C(){
cout<<"调用析构函数"<<endl;
}
void show()
{
cout<<"x="<<x<<'\t'<<"y="<<y<<'\n';
}
void *operator new (size_t s)
{
void *p=new char [s];
cout<<"调用函数new(size_t s),分配空间为:"<<s<<'\n';
return p;
}
void operator delete (void *p)
{
delete (p);
cout<<"调用函数delete(void *p)\n";
}
};
int main(void)
{
C *p1;
p1=new C;
p1->show();
delete(p1);
getchar();
return 0;
}