问在SFML中由RectangleShape组成的Tilegrid给出转换错误

EN

#include <SFML\Graphics.hpp>

int main() 
{
    int xWindow = 1280; //Divided by 40 pixels, equals to a width of 32 tiles
    int yWindow = 720; //Divided by 40 pixels, equals to a height of 18 tiles
    float array[32][18] = { 0 };

    sf::RenderWindow window(sf::VideoMode(xWindow, yWindow), "Title"); //32 & 18

    while (window.isOpen())
    {
        ////////Grid variables/////////
        int xFactor = 32;
        int yFactor = 18;
        int size = 40;
        ////////Events////////

        ////////draw////////
        window.clear();

        for (int i = 0; i <= 31;i++)
        {
            for (int j = 0; j <= 17; j++)
            {
                sf::RectangleShape block(sf::Vector2f(size, size));
                block.setFillColor(sf::Color::Blue);
                block.setPosition(array[i * size][j * (size)]); //ERROR OCCURS HERE: cannot convert argument 1 from 'float' to 'const sf::Vector2f &'
                window.draw(block);
            }
        }

        ///////Display//////
        window.display();
    }
}