Lolechi asteroids faulty full source

#include <C:\SFML-2.3.2\include\SFML\Graphics.hpp>
#include <iostream>
#include <ctime> //Time
#include <cstdlib> //Rand
#include <math.h>
#define PI 3.14159265

using namespace std;

class asteroid{
    public:
        sf::Vector2f pos;
        float angle;
        void create(sf::ConvexShape);
        void update(sf::Vector2f, sf::ConvexShape);
};
/* Work in progress */
void asteroid::update(sf::Vector2f a, sf::ConvexShape b){
    pos += a;
    b.setPosition(pos);
};

void asteroid::create(sf::ConvexShape a){ //Tweak the drawing values for a better effect
    cout << "Creating..." << endl;

    a.setPointCount(20);
    srand(time(0)); //Set random seed
    int minDelta = 25;
    int maxDelta = 75;
    int minRad = 25;
    int maxRad = 50;
    float step = (float)PI / 10;
    int r = rand()%minRad + maxRad; //Radius
    float x, y;

    for(int i = 0; i < a.getPointCount()+1; i++){ //Drawing asteroid
        x = r*cos(step*i);
        y = r*sin(step*i);
        a.setPoint(i, sf::Vector2f(x + (rand()% minDelta + maxDelta), y + (rand()% minDelta + maxDelta)));
    }
    a.setFillColor(sf::Color::White);
    pos = sf::Vector2f(rand()%800, rand()%600); //Random position on screen | Look into casting, convert rand() from int to float
    a.setPosition(pos); //Spawn on that position

    cout << "Done!" << endl;
};

int main()
{
    // Init //
    sf::RenderWindow window(sf::VideoMode(800, 600), "Asteroids!", sf::Style::Default);

    /* Old
    std::vector<sf::ConvexShape> allShapes; //List of all asteroid SHAPES
    std::vector<asteroid> allAsteroids; //List of asteroid CLASS OBJECTS
    allAsteroids.push_back(asteroid()); //New asteroid CLASS OBJECT

    for(std::vector<asteroid>::iterator it = allAsteroids.begin(); it != allAsteroids.end(); ++it){ //Creating an asteroid shape per 'asteroid' object inside "allAsteroids"
        it->create(allShapes);
    }

    //Send update() both a velocity vector and a iterator to access the shape
    for(std::vector<asteroid>::iterator classIt = allAsteroids.begin(); classIt != allAsteroids.end(); ++classIt){
        for(std::vector<sf::ConvexShape>::iterator shapeIt = allShapes.begin(); shapeIt != allShapes.end(); ++shapeIt){
            auto shapePos = (*shapeIt);
        }
    }
    */

    std::map<asteroid, sf::ConvexShape> asteroids;
    asteroids.insert(std::pair<asteroid, sf::ConvexShape>(asteroid(),sf::ConvexShape())); //New CLASS OBJECT and SHAPE inside map
    asteroids.insert(std::pair<asteroid, sf::ConvexShape>(asteroid(),sf::ConvexShape())); //New CLASS OBJECT and SHAPE inside map
    for(std::map<asteroid, sf::ConvexShape>::iterator tempIt = asteroids.begin(); tempIt != asteroids.end(); ++tempIt){ //Generate SHAPES for each CLASS OBJECT
        auto classIt = tempIt->first;
        auto shapeIt = tempIt->second;
        classIt.create(shapeIt);
    }

    // Loop //
    while (window.isOpen())
    {
        // Event //
        sf::Event event;
        while (window.pollEvent(event))
        {
            switch (event.type){
                case sf::Event::Closed:
                    window.close();
                break;
                case sf::Event::KeyPressed:
                    if(event.key.code == sf::Keyboard::Escape){ //Escape = Close
                        window.close();
                    }
                break;
            }
        }
        /*
        for(std::map<asteroid, sf::ConvexShape>::iterator tempIt = asteroids.begin(); tempIt != asteroids.end(); ++tempIt){ //Update every asteroid SHAPE's position
            auto classIt = tempIt->first;
            auto shapeIt = (*tempIt).second;
            classIt.update(sf::Vector2f(10, 10), shapeIt); //Vector2f is velocity
        }
        */
        // Display //
        window.clear();
        for(std::map<asteroid, sf::ConvexShape>::iterator tempIt = asteroids.begin(); tempIt != asteroids.end(); ++tempIt){ //Draw all asteroid SHAPES
            auto it = (*tempIt).second;
            window.draw(it);
        }
        window.display();
    }

    return 0;
}

//          To-Do:
// Troubleshoot errors. Starting with double to float conversion warnings.
// Handle multiple asteroids. Errors?