Sqrt.h

#ifndef Sqrt_h
#define Sqrt_h
#include "Primitive.h"
#include <cmath>
 
namespace Tree {
namespace Primitives {
 
    class Sqrt : public Primitive
    {
    public:
        Sqrt(void)
        {
            nArguments_ = 1;
            name_ = "sqrt";
        }
 
 
        ~Sqrt(void)
        { }
 
 
        void execute(void* result, Tree& tree)
        {
            double& arg = *(double*)result;
            getNextArgument(&arg, tree);
            if (arg > 0) {
                arg = sqrt(arg);
            } else {
                arg = 0;
            }
        }
    };
 
}
}
 
#endif