memberwise和bitwise?

[中才德创]

class Point3d
{
public:
	Point3d(float x, float y, float z)
	{
		_x = x;
		_y = y;
		_z = z;
	}
	
private:
	float _x;
	float _y;
	float _z;
};

int _tmain(int argc, _TCHAR* argv[])
{
	Point3d pt1(3.0f, 4.0f, 5.0f);
	Point3d pt2(pt1);
	/*
	"Point3d pt2(pt1)"行的二进制译码如下
	mov         eax,dword ptr [ebp-10h] 
	mov         dword ptr [ebp-24h],eax 
	mov         ecx,dword ptr [ebp-0Ch] 
	mov         dword ptr [ebp-20h],ecx 
	mov         edx,dword ptr [ebp-8] 
	mov         dword ptr [ebp-1Ch],edx 

	《C++对象模型》第二章 构造函数语意学 P72页
	写有:
	"一个Point3d class object 的memberwise初始化操作会导致bitwise copy"

	问题一:
	memberwise和bitwise之间是如何界定的?
	*/

	return 0;
}

[mengde007]

看类是否有拷贝构造函数；

[taodm]

看书不仔细，前看后忘。p53。

[pengzhixi]

帮顶!