Precision error?

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Hi,

I have written a simple code as follorws:

//************* BEGIN CODE ******************
double a;
a= 106.3 - 137.3
//************* END CODE ******************

I am expecting a value of -31.

But, I get a value of -31.000000000000014

Did I miss out something here? Due to system design, we do not wish to use
the 'round' command.

Can anyone enlighten me whether this is a bug?

Thanks
rgds,
 
Hello tym,

Why not to use this?

decimal a;
a = 106.3m - 137.3m;

t> I have written a simple code as follorws:
t> //************* BEGIN CODE ******************
t> double a;
t> a= 106.3 - 137.3
t> //************* END CODE ******************
t> I am expecting a value of -31.
t> But, I get a value of -31.000000000000014

---
WBR,
Michael Nemtsev :: blog: http://spaces.msn.com/members/laflour

"At times one remains faithful to a cause only because its opponents do not
cease to be insipid." (c) Friedrich Nietzsche
 
Hi Michael,

The example is a simplified scenario. In my programs, the value could be
obtained from databases or other sources. So, it could be something like:

double a;
a = var1 + var2

where var1 and var2 could be passed in from some external source.

Thanks
rgds,
 
tym said:
I have written a simple code as follorws:

//************* BEGIN CODE ******************
double a;
a= 106.3 - 137.3
//************* END CODE ******************

I am expecting a value of -31.

But, I get a value of -31.000000000000014

Did I miss out something here? Due to system design, we do not wish to use
the 'round' command.

Can anyone enlighten me whether this is a bug?
Click to expand...

No, it's not a bug. See
http://www.pobox.com/~skeet/csharp/floatingpoint.html
 
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