转换数据类型 [英] Converting Datatypes

问题描述

您好，

我在c：

WORD calcChecksum（BYTE数据[]，WORD长度）

{

WORD * i_data;

WORD校验和= 0;

字节i = 0;


i_data =（WORD *）数据;


数据..这是数据[0]在128处，并由上面的

语句改为6272。


in c＃我这样做了


ushort i_data;

ushort checksum = 0;

byte i = 0;


i_data =（ushort）data [0];


但是i_data dos在这里不会改变。


帮助！

并且谢谢

解决方案

C＃没有指针。你将data [0]的值放入i_data。


你必须重新考虑你正在做的事情。


AMP写道：

你好，

我有c：

WORD calcChecksum（BYTE数据[]，WORD长度）

{

WORD * i_data;

WORD校验和= 0;

字节i = 0;


i_data =（WORD *）数据;


数据..这是数据[0]来自128并由<变为6272 br />
以上陈述。


in c＃我这样做了


ushort i_data;

ushort checksum = 0;

byte i = 0;


i_data =（ushort）data [0];


但是i_data不会在这里改变。


帮助！

并且谢谢

< blockquote>应该没关系i_data =（WORD *）数据正在转换

数据中的值（这是128的字节值）到了一个价值为

6272的WORD（ushort）...每次。

我不知道怎么做，但我不认为指针是相对的。


Ian Semmel写道：

C＃没有指针。你将data [0]的值放入i_data。


你必须重新考虑你正在做的事情。


AMP写道：

你好，

我有c：

WORD calcChecksum（BYTE数据[]，WORD长度）

{

WORD * i_data;

WORD校验和= 0;

字节i = 0;


i_data =（WORD *）数据;


数据..这是数据[0]来自128并由<变为6272 br />
以上陈述。


in c＃我这样做了


ushort i_data;

ushort checksum = 0;

byte i = 0;


i_data =（ushort）data [0];


但是i_data不会在这里改变。


帮助！

并且谢谢

实际上，C＃*确实*有指针。它们处于不安全的环境中，但是它们是
是托管指针。


-

HTH，
< br $>
Kevin Spencer

微软MVP

鸡肉沙拉手术


你所寻求的是你得到的。


" Ian Semmel" <是*********** @ NOKUNKrocketcomp.com.auwrote in message

news：eg ************** @ TK2MSFTNGP02。 phx.gbl ...

C＃没有指针。你将data [0]的值放入

i_data。


你将不得不重新考虑你正在做的事情。

AMP写道：

>您好，
我在c：
WORD calcChecksum（BYTE data []，WORD长度）
{WORD * i_data;
WORD校验和= 0;
BYTE i = 0;

i_data =（WORD *）数据; <数据..这是数据[0]来自128并通过上面的
语句改为6272.

在c＃中我做了这个

ushort i_data;
ushort checksum = 0;
byte i = 0;

i_data =（ushort）data [0];

帮助！
并且谢谢

Hello,
I have in c:
WORD calcChecksum(BYTE data[], WORD length)
{
WORD* i_data;
WORD checksum= 0;
BYTE i= 0;

i_data= (WORD*)data;

data.. which is data[0] comes in at 128 and gets changed to 6272 by the
statement above.

in c# i did this

ushort i_data;
ushort checksum = 0;
byte i = 0;

i_data = (ushort)data[0];

but i_data dos not change here.

Help!
And Thanks

解决方案

C# does not have pointers. You are putting the value of data[0] into i_data.

You will have to rethink whatever you are doing.

AMP wrote:

Hello,
I have in c:
WORD calcChecksum(BYTE data[], WORD length)
{
WORD* i_data;
WORD checksum= 0;
BYTE i= 0;

i_data= (WORD*)data;

data.. which is data[0] comes in at 128 and gets changed to 6272 by the
statement above.

in c# i did this

ushort i_data;
ushort checksum = 0;
byte i = 0;

i_data = (ushort)data[0];

but i_data dos not change here.

Help!
And Thanks

It should not matter i_data=(WORD*)data is converting the value in
data(which is a byte value of 128 to a WORD(ushort) with a value of
6272...every time.
I dont know how, but i dont think the pointer is relative.

Ian Semmel wrote:

C# does not have pointers. You are putting the value of data[0] into i_data.

You will have to rethink whatever you are doing.

AMP wrote:

Hello,
I have in c:
WORD calcChecksum(BYTE data[], WORD length)
{
WORD* i_data;
WORD checksum= 0;
BYTE i= 0;

i_data= (WORD*)data;

data.. which is data[0] comes in at 128 and gets changed to 6272 by the
statement above.

in c# i did this

ushort i_data;
ushort checksum = 0;
byte i = 0;

i_data = (ushort)data[0];

but i_data dos not change here.

Help!
And Thanks

Actually, C# *does* have pointers. They are in an unsafe context, but they
are managed pointers.

--
HTH,

Kevin Spencer
Microsoft MVP
Chicken Salad Surgery

What You Seek Is What You Get.

"Ian Semmel" <is***********@NOKUNKrocketcomp.com.auwrote in message
news:eg**************@TK2MSFTNGP02.phx.gbl...

C# does not have pointers. You are putting the value of data[0] into
i_data.

You will have to rethink whatever you are doing.

AMP wrote:

>Hello,
I have in c:
WORD calcChecksum(BYTE data[], WORD length)
{
WORD* i_data;
WORD checksum= 0;
BYTE i= 0;

i_data= (WORD*)data;

data.. which is data[0] comes in at 128 and gets changed to 6272 by the
statement above.

in c# i did this

ushort i_data;
ushort checksum = 0;
byte i = 0;

i_data = (ushort)data[0];

but i_data dos not change here.

Help!
And Thanks

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