I want to perform a bitwise and(&) operation between two variable.but I have one value in double.but double does not allow bitwise opearation.

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I want to perform a bit wise operation between two number.one is of double type and other is of int type.And when i am executing the code getting the exception that.Bitwise and operation can not be performed between double and int.

What I have tried:

string add64 = "0013A2004154EC8E";
double num_add64 =Int64.Parse(add64, System.Globalization.NumberStyles.HexNumber);
int sumadd = (int)sum;
int r = sumadd & ck;

after type casting .In sumadd variable i m getting negative value.That is the problem.
Please help me.Thank you in advance.

Posted 11-Jan-18 22:14pm

Akhand Jyoti

Updated 11-Jan-18 22:52pm

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Comments

Richard MacCutchan 12-Jan-18 4:27am

This makes no sense, what problem are you trying to solve?

CodeWraith 12-Jan-18 4:57am

He is wrestling with the same problems as many others: No understanding of the data types and how they are stored in memory, stringly typing and then parsing or converting to some not too well chosen datatype, only to cast it to another not well chosen datatype.

In the end it looks like he simply wants to initialize a variable with a literal 64 bit address and then mask out (guessing!) some part with a checksum.

Richard MacCutchan 12-Jan-18 5:07am

I know, that is why I posed my question.

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Jochen Arndt · Accepted Answer · 2018-01-11T22:52:00

Why are you assigning the Int64 to a double?

Cast the second operand ck to Int64 instead and perform the operation:

C#

Int64 num_add64 =Int64.Parse(add64, System.Globalization.NumberStyles.HexNumber);
int r = Convert.ToInt32(num_add64 & Convert.ToInt64(ck));

Because you are dealing with integers of different width and performing an AND operation, you should check if using uint might be a better choice here (assuming ck is an uint):

C#

UInt64 num_add64 =UInt64.Parse(add64, System.Globalization.NumberStyles.HexNumber);
uint r = Convert.ToUInt32(num_add64) & ck;