这是我的C ++结构(文档说每个实例的大小必须恰好是10个字节):
#pragma pack (1)
struct LaserPoint {
WORD x;
WORD y;
byte colors[6];
};
我制作了以下C#结构:
[StructLayout(LayoutKind.Sequential, Pack=1)]
public struct LaserPoint {
public UInt16 x; // 2 bytes
public UInt16 y; // 2 bytes
public byte[] colors; // 6 bytes
}
这是我的C#项目中的完整测试代码:
using System;
using System.Runtime.InteropServices;
namespace StructSizeTest {
class Program {
[StructLayout(LayoutKind.Sequential, Pack=1)]
public struct LaserPoint {
public UInt16 x; // 2 bytes
public UInt16 y; // 2 bytes
public byte[] colors; // byte[6] = 6 bytes
}
static void Main(string[] args) {
LaserPoint point = new LaserPoint();
point.x = (UInt16)16384;
point.y = (UInt16)32768;
point.colors = new byte[6];
point.colors[0] = 255;
point.colors[1] = 255;
point.colors[2] = 255;
point.colors[3] = 255;
point.colors[4] = 255;
point.colors[5] = 255;
Console.WriteLine("LaserPoint.Size: " + Marshal.SizeOf(point));
Console.ReadLine();
}
}
}
这是控制台上的输出:
LaserPoint.Size: 8
为什么是point8个字节而不是10个字节?
UInt16 = 2 bytes
UInt16 = 2 bytes
byte[6] = 6 bytes
Total = 10 bytes ?
我在这里想念的是什么?
慕妹3242003
相关分类