How Do I Enable Arithmetic Operators In My Classes

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It keeps telling me that i cant use these operators on the double,decimal,int data types. i know i can but how?

C#

public decimal Total { get; set; }
        public decimal Discount { get
            {
            double dis=0;
            dis=Total-(Total*0.05);
             }
            set; }
        public decimal Deposit { get; set; }

ive been told that there is a 'using'reference i need to use.

I am new to MVC5

Posted 28-May-14 0:00am

Member 10816271

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Ajith K Gatty 28-May-14 6:25am

You are new to MVC5. Ok. Are you even new too OOP Concepts??

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CHill60 · Accepted Answer · 2014-05-28T00:43:00

You are mixing double (dis) and decimal (Total) in your calculation so you are getting an error

Quote:
Operator '*' cannot be applied to operands of type 'decimal' and 'double'

This is because 0.05 is of type double. To convert it to decimal add an 'M' to the end of it like this

dis = Total - (Total * 0.05M);

However you are still mixing double and decimal values and will then get a different error

Quote:
Cannot implicitly convert type 'decimal' to 'double'. An explicit conversion exists (are you missing a cast?)

To get around that cast the result of the calculation to a double

dis = (double)(Total - (Total * 0.05M));

or better yet, be consistent with your variable types