我应该使用哪种数据类型来满足C＃中的以下要求

Question

First I will explain the name of different properties and function that will be performed on them. Afterwards you tell me which datatype should i use for them ??

1) Gross Weight(user will enter) : Will be in quintals(weight category). For Example : 147.3800.

2) Less Tear(user will enter : Also be in quintals(weight category). For Example : .3800.

3) Net Weight(Auto-Computed) : In quintals(weight category). For Example : GrossWeight - Less Tear.

4) Rate/Quintal(user will enter) : Amount for per quintal. For Example : 4560.55

5) Total Amount(Auto-Computed) : For Example : NetWeight x Rate/Quintal

Now tell me the preferable data-types for above five fields in C#.

Answer 1

In every case you probably want to use a floating point value, which means a decision between double and decimal.

Since .NET lacks objects dealing with arbitrary-precision floating point operations, the choice is connected mostly with precision and range. Decimal has smaller range (from 10e-28 up to 7.9 x 10e28, but better precision (28-29 significant digits). Double works the other way round (range from ~10e-324 to ~10e308 and 15-16 digits).

For this scenario I would recommend using decimals in all cases.

Answer 2

When possible, use decimal for money (#4 and #5) to avoid floating-point representation errors.

For physical measurements like weight, or for irrational-valued functions like sin or log , prefer double .