Compile Error

[kmd]

I got "compile error" in the online judge.

But I've tried to compile my source code with g++ on my FreeBSD, Dev-C++ & VC++ on my Windows, without getting any errors.

Does anyone have a hint?
Your opinion will be appreciated.

[cpp]#include<iostream>
#include<iomanip>
#include<cmath>
#define PI 3.1415926535
using namespace std;

int main(){
double D, V;
long double d;
while(cin >> D >> V){
if(D==0 && V==0) return 0;

d = cbrt( pow(D,3)-6*V/PI );
cout.setf(ios::fixed);
cout << setprecision(3) << d << endl;
}
}[/cpp]

[kmd]

Now I see what's the problem in my code
The online judge environment isn't compatible with the "cbrt()" function in cmath header file

[Juergen Werner]

Since the judge uses GCC, it could compile it since GCC supports cbrt(), but as far as I know they compile with the '-ansi' option, and cbrt() does not conform to ANSI.

Code: Select all

CBRT(3)             Linux Programmer's Manual             CBRT(3)
...
CONFORMING TO
       cbrt is a GNU extension.

cbrt() can be substituted using pow which is also contained in 'math.h':

Code: Select all

cbrt(a)
pow(a, 1.0/3.0)

Btw, you can also get PI by

Code: Select all

const double PI = 2 * acos(0);

[Maxim]

Btw, you can also get PI by

Code: Select all

const double PI = 2 * acos(0);

For simplicity,

Code: Select all

const double PI = acos(-1.0);

Maxim