How to develop a C ++ cockroach robot prototype

#include <iostream>
#include <cstdlib>
#include <vector>
#include <cmath>
#include <string>
#include <omp.h> // Compiler/Linker Options are already set in C::B '.CBP' file

using namespace std;

//Structures and functions
struct point_type
{
	double x, y;
	point_type();
	point_type(double x, double y);
};

struct circle_type
{
	point_type position;
	double radius;
	circle_type();
	circle_type(point_type position,double radius);
};

point_type::point_type()
{
	x = 0.0;
	y = 0.0;
}
point_type::point_type(double x,double y)
{
	this->x=x;
	this->y=y;
}

circle_type::circle_type()
{
	position=point_type();
	radius=0.0;
}

circle_type::circle_type(point_type position, double radius)
{
	this->position=position;
	this->radius=radius;
}