如何清空结构体？

如何清空结构体？
方法一：

struct CoreObject
{
int boxNo;
int orderX;
int orderY;
int orderR;
int x;
int y;
int r;
int isUse;
QString rfidCode;
QString time;
};

CoreObject core = { 0, 0, 0, 0, 0, 0, 0, 0, "", "" }; //使用的时候清空

方法二：
struct CoreObject
{
int boxNo;
int orderX;
int orderY;
int orderR;
int x;
int y;
int r;
int isUse;
QString rfidCode;
QString time;

CoreObjectEx
{
boxNo = 0;
orderX = 0;
orderY = 0;
orderR = 0;
x = 0;
y = 0;
r = 0;
isUse = 0;
rfidCode = "";
time = "";
}
};

CoreObject core; //构造的时候清空