how to find the closest int value of a float in c++

Question

for eg if float value is 0.85 then the int value must be 1 because it is closest to 1.
Any function,,help!!!😢

Answer 1

double round(double d) {
return floor(d + 0.5);
}

Answer 2

www.cplusplus.com/reference/cmath/round/

Answer 3

ty