题解 | #求解立方根#

#include <iostream>
#include <iomanip>
using namespace std;

double cal(double x){
    double left=min(-1.0,x);
    double right=max(1.0,x);
    double n;
    while(abs(right-left)>0.01){
        n=(right+left)/2;
        if(n*n*n>x)right=n;
        else left=n;
    }
    return n;
}
int main() {
    double n;
    while(cin>>n){
        cout<<fixed<<setprecision(1)<<cal(n)<<endl;
    }
}
// 64 位输出请用 printf("%lld")