c++结构体指针定义与使用

#include <iostream>

using namespace std;

typedef struct _st_point
{
  int x;
  int y;
}st_point,*p_st;

int main()
{
  p_st p;
  p=new st_point;
  int x=p->x=0;
  cout << x << endl;
  delete p;
  return 0;
}