How to Convert Int type to Byte in c++/CLI

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Hello everybody, I come up with a newbie question again. Well I need to convert integers INT to Byte types like 0x00 to 0xFF. I really dont know how to do this and wcan't find the info as well. If any of you know about this please help me.

Btw do I need to add an special header for converting

Posted 11-Oct-11 20:23pm

GuSuB

Updated 11-Oct-11 20:25pm

v2

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Richard MacCutchan · Accepted Answer · 2011-10-11T22:41:00

Solution 1

If you mean you wish to display an integer as a series of hex bytes, then you just need to use the %x or %X format specification[^] in a printf()[^] statement.

[edit]
That's fine then you just use a cast such as

C++

byte b = (byte)integerValue;

However for integer values greater than 255, you need to split the integer thus:

C++

for (int i = 3; i >= 0; ++i)
{
    byte b = (integervalue >> 8 * i) & 0xFF;
    send(b);
}

[/edit]

Posted 11-Oct-11 22:41pm

Richard MacCutchan

Updated 12-Oct-11 9:17am

v2

Comments

GuSuB 12-Oct-11 12:58pm

Thank you, but what I need is to change an INT variable into BYTE, I need this to fill an array<byte^> an send this array through serial port to my robot. I just need to change Type and send it on serial port.For example:

i have INT A=0, I need to send this as a Byte 0x00 in serial port
INT A=255 , send as Byte 0xFF..

I am a newbie yet. Thanks a lot

Richard MacCutchan 12-Oct-11 15:17pm

See my edit entry above.

GuSuB 12-Oct-11 21:03pm

HI thanks, you are right, I need to do some kind of casting but I tried the Cast and got this error message:

44 Error C2440: 'type cast': can not convert from 'int' to 'System:: Byte ^'

All my Integer values are lower than 255.

GuSuB 12-Oct-11 21:06pm

This is how I am trying to cast:

Byte^ bdrh=(Byte^)DRh; where DRh is an int type

Richard MacCutchan 13-Oct-11 5:05am

You are trying to cast to a reference rather than an element; it should be Byte bdrh = (Byte)DRh;. You can then pass the byte value bdrh into your array or whatever. Alternatively if you allocate your array first you can add the element directly by normal C++/CLI array referencing.