题解 | #求解立方根#
求解立方根
http://www.nowcoder.com/practice/caf35ae421194a1090c22fe223357dca
数学迭代问题
import java.util.Scanner;
public class Main {
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
while (sc.hasNext()){
double input = sc.nextDouble();
double n = getCubeRoot(input);
System.out.printf("%.1f",n);
}
}
public static double getCubeRoot(double input) {
if ( input == 0) {
return 0;
}
double x0 = input;
double x1 = (2*x0 + input/x0/x0)/3;
while (Math.abs(x1 - x0) > 0.001) {
x0 = x1;
x1 = (2*x0 + input/x0/x0)/3;
}
return x1;
}
}
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