【浮点数二分】

数的三次方根

#include<iostream>
using namespace std;double n;int main(){cin>>n;double l = -10000;double r = 10000;while((r-l)>=1e-8){double mid = (l+r)/2;if((mid*mid*mid)>=n)    r = mid;else    l = mid;}printf("%lf",l);return 0;
}