convert decimal to bit and check

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i have a device which will giv me the feedback in int type

exp:146,33 etc...

is c++ .net provide any build-in function or method to convert them to bit number?i m using windows form application in visual studio 2008.

another question is how can i split a bit number lets said 10001100 to 8 pieces so i can check each bit is turn off or not?

Posted 18-Aug-10 18:06pm

tuolesi

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Yes, C++ supports bit masking (use the ampersand) a bit shifting (use double greater than or double less than signs). Google those terms (or start here).

Posted 18-Aug-10 18:36pm

AspDotNetDev

Updated 18-Aug-10 18:39pm

v2

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Roger Wright · Accepted Answer · 2010-08-18T19:07:00

I believe the ToString method will convert your int to an ASCII or Unicode representation, not a binary equivalent. You could cast your int to another appropriately sized type:

byte - 8-bits
ushort - 16-bits
uint - 32-bits

result = (byte)MyInt;

Finding the value of each bit is simple; use the & operator to AND your value with a constant

if (result & 0x01)
{ bool bit0 = true;}
if (result & 0x02)
{ bool bit1 = true;}
.
.
.
if (result & 0x80)
{ bool bit7 = true;}

It's a brute force method, and you'll end up with 8 different values, but that might be handy in some applications. Before you perform a cast from int to something smaller, be sure to check that the value is in the proper range for the type else you'll get an error. That is, if your int value is 256 or greater, don't try to cast it to a byte type.

**JF2015** · Accepted Answer · 2010-08-18T18:19:00

Hi,

you can convert the integer to a string that holds the binary representation:

int integerValue = 25;
string *bits = Convert::ToString(integerValue,2);

Then to get the single bit you can use the string.substring function:

string *bit = bits->Substring(2, 1);

Then you would only need to check for the content of the string "bit".

Maybe there is a more simple solution.

Best regards,

JF

convert decimal to bit and check

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