big number wasting memory?

[ajikoe]

Hello,

I would like to use a lot of process which will use big numbers variable such as :
double.MaxValue
int.MaxValue
Is it will waste my memory when I do the process?
For simple example :
public class test{
int i;
public test(int inpI){
i = int.MaxValue - inpI
}
.....
.....
}
Sincerely Yours,
Pujo

 

[chiph]

A double takes the same amount of memory, no matter what the contents. You can use the sizeof operator to see this for any value type.

That being said, you have to make sure the contents stay within the range that the variable supports (between MinValue and MaxValue, plus the special values of NegativeInfinity and PositiveInfinity for double).

Chip H.


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[stevexff]

It isn't really how much memory a double occupies that's the issue here, more a case of how many of them you want to have resident in memory at the same time.

You say you would like 'a lot'. What's that? Hundreds? Thousands? Millions?

Memory usage is only really a problem when you don't have enough for what you want to do. Otherwise, if it's there, you may as well use it.

 

[obislavu]

I would like to add to the previous posts the you should use checked when you do calculation and conversions in order to get overflow exceptions.
Example:

int x = 1000000;
int y = 1000000;
int z=x*y; // z is -727379968 !!!

The program is working with wrong z but with the following code:

int x = 1000000;
int y = 1000000;
int z=checked(x*y);

the Overflow exception is thrown.
obislavu