sqrt() of int type in C

Question

I am programming in the c language on mac os x. I am using sqrt, from math.h, function like this:

int start = Data -> start_number;
double localSum;

for          


        

Answer 1

Int can be safely upcast automatically to a double because there's no risk of data loss. The reverse is not true. To turn a double to an int, you have to explicitly cast it.