正确打开方式;-)
Coordinate coor;
coor.x = 10;
coor.y = 10;
coor.printX();
coor.printY();
Coordinate *p = new Coordinate();
//申请失败
if(NULL == p){
return 0;
}
p->x = 20;
p->y = 30;
p->printX();
p->printY();
(*p).x = 30;
(*p).y = 40;
(*p).printX();
(*p).printY();
//释放内存
delete p;
p = NULL;
