Explanation of casting/conversion int/double in C#
- by cad
I coded some calculation stuff (I copied below a really simplifed example of what I did) like CASE2 and got bad results. Refactored the code like CASE1 and worked fine. I know there is an implicit cast in CASE 2, but not sure of the full reason. Any one could explain me what´s exactly happening below?
//CASE 1, result 5.5
double auxMedia = (5 + 6);
auxMedia = auxMedia / 2;
//CASE 2, result 5.0
double auxMedia1 = (5 + 6) / 2;
//CASE 3, result 5.5
double auxMedia3 = (5.0 + 6.0) / 2.0;
//CASE 4, result 5.5
double auxMedia4 = (5 + 6) / 2.0;
My guess is that /2 in CASE2 is casting (5 + 6) to int and causing round of division to 5, then casted again to double and converted to 5.0.
CASE3 and CASE 4 also fixes the problem.
