A simple Collision Detection Program in C++

#include <SFML/Graphics.hpp>
#include <iostream>
using namespace std;
#include <cmath>

class Vector2{
    public:
        float x, y;
        Vector2();
        Vector2(float a, float b);

        float getMagnitude();
        Vector2 getNormalised();
        void normalised();

};

Vector2::Vector2(){
    x = 0;
    y = 0;
}
Vector2::Vector2(float a, float b){
    x = a;
    y = b;
}
float Vector2::getMagnitude(){

    float m = (float)sqrtf(x*x+y*y);
    return m;

}

void swapHeadings(Vector2 *a, Vector2 *b){

    Vector2 t = *a;
    a->x = b->x;
    a->y = b->y;

    b->x = t.x;
    b->y = t.y;
}

void doCollision(Vector2 *a, Vector2 *b, int r1, int r2, bool *collided){

    Vector2 dist(b->x-a->x, b->y-a->y);
    if (dist.x < 0){
        dist.x = dist.x*-1;

    }
    if (dist.y < 0){
        dist.y = dist.y*-1;
    }


    float magni = dist.getMagnitude();
    if (r1+r2 >= magni){
        *collided = true;
    }
    else if (r1+r2 < magni){
        *collided = false;
    }


}
int main(){

    sf::RenderWindow window{{640,480}, "Collision Test"};
    window.setVerticalSyncEnabled(true);
    //window.setFramerateLimit(60);
    bool running = true;
    bool collided = false;

    Vector2 v1(0, 100);
    Vector2 v2(640, 100);

    Vector2 hV1(1,1);
    Vector2 hV2(-1,1);
    doCollision(&v1, &v2, 5, 5, &collided);
    sf::Texture t;
    if (!t.loadFromFile("icon.png")) return -1;
    sf::Sprite spr{t};
    spr.setPosition({100,100});
    while (running){

        v1.x += hV1.x*2;
        v1.y += hV1.y*2;

        v2.x += hV2.x*2;
        v2.y += hV2.y*2;

        if (v1.x <= 0){
            hV1.x = 1;

        }
        if (v1.x >= 630){
            hV1.x = -1;
        }
        if (v1.y <= 0){
            hV1.y = 1;
        }
        if (v1.y >= 470){
            hV1.y = -1;
        }
        if (v2.x <= 0){
            hV2.x = 1;

        }
        if (v2.x >= 630){
            hV2.x = -1;
        }
        if (v2.y <= 0){
            hV2.y = 1;
        }
        if (v2.y >= 470){
            hV2.y = -1;
        }
        doCollision(&v2, &v1, 5, 5, &collided);

        cout<<"Collided: "<<collided<<endl;
        if (collided){
            swapHeadings(&hV1, &hV2);
        }
        sf::Event event;

        sf::RectangleShape rect1{{10,10}};
        sf::RectangleShape rect2{{10,10}};

        rect1.setFillColor(sf::Color::White);
        rect2.setFillColor(sf::Color::Red);

        rect1.setPosition({v1.x, v1.y});
        rect2.setPosition({v2.x, v2.y});
        while (window.pollEvent(event)){
            if (event.type == sf::Event::Closed){
                running = false;
            }
        }

        window.clear();
        window.draw(rect1);
        window.draw(rect2);
        //window.draw(spr);
        window.display();
    }
    window.clear();
    return 0;
}