My problem is, that when you call my round function it works in theory, but in practice it just has some data-lags and I don't want to cut the number with build-ins because I wanted to create a function without build-ins. For example the input round.round(24.754537, 3) doesn't return 24.755 as it should, but it returns 24.75500000000727.
public class Round {
public double round(double number, int decimals) {
//Stores the number in rounded number for subtraction below
double rounded_num = number;
//Defines the size in which we are rounding
double round_size = 1d / pow(10, decimals);
//Subtracts as long as the value is higher or lower than the half round size cuz of rounding till .5
if (number > 0) {
while (rounded_num >= round_size/2) {
rounded_num -= round_size;
}
}
else if (number < 0) {
while (rounded_num <= -round_size /2) {
rounded_num += round_size; } }
//subtracts from the rest of subtracting from the incoming number
return number - rounded_num;
}
private int pow(int base, int power) {
int number = 1;
for (int i = 0; i < power; i++) {
number *= base;
}
return number;
}
}
