Because what you done is here integer division.
1 / 4 always give you
0 as a result regardless which type you assing it.
.NET has 3 type of division. From
7.7.2 Division operator
- Integer division
- Floating-point division
- Decimal division
From Integer division part;
The division rounds the result towards zero, and the absolute value of
the result is the largest possible integer that is less than the
absolute value of the quotient of the two operands.
If you want to
0.25 as a result, you should define one of your values as a floating point.
You can use one of these;
double d = 1d / 4d;
double d = 1d / 4;
double d = 1 / 4d;
And what should we do if statement is in terms of integer variables
double a =(a-b)/(d+e);
I assume your
e are integers, you should use one of these then;
double a = (double)(a-b) / (double)(d+e);
double a = (a-b) / (double)(d+e);
double a = (double)(a-b) / (d+e);