How to generate random colours and implement them into SFML

#include <SFML/Graphics.hpp>
#include <stdlib.h>     /* srand, rand */
#include <time.h>       /* time */



int main( )
{
    // needed for better random generation
    srand (time(NULL));
    
    sf::RenderWindow window( sf::VideoMode( 640, 480 ), "Awesome Game" );
    
    
    sf::RectangleShape rectangles[10];
    
    for (int i = 0; i < 10; i++)
    {
        rectangles[i].setSize( sf::Vector2f( 50.0f, 50.0f ) );
        
        int r = rand() % 255;
        int g = rand() % 255;
        int b = rand() % 255;
        
        rectangles[i].setFillColor( sf::Color( r, g, b ) );
        rectangles[i].setPosition( i * 60.0f, 0.0f );
    }
    
    while ( window.isOpen( ) )
    {
        sf::Event event;
        
        // handle all events
        while ( window.pollEvent( event ) )
        {
            switch ( event.type )
            {
                case sf::Event::Closed:
                    window.close( );
                    
                    break;
            }
        }
        
        // update the game
        
        window.clear( );
        
        // draw objects here
        for (int i = 0; i < 10; i++)
        {
            window.draw( rectangles[i] );
        }
        
        window.display( );
    }
}