int main$()\{$

float length, width, radius, side;

std::cout $<<$ "Enter the length and width of the rectangle: $"$;

std::cin $>>$ length $>>$ width;

Rectangle rectangle$($length$,$ width$)$;

std::cout $<<$ "Rectangle Area: $"<<$ rectangle.calculateArea$()<<",$ Perimeter: $"<<$ rectangle.calculatePerimeter$()<<$ std::endl;

std::cout $<<$ "Enter the radius of the circle: $"$;

std::cin $>>$ radius;

Circle circle$($radius$)$;

std::cout $<<$ "Circle Area: $"<<$ circle.calculateArea$()<<",$ Perimeter: $"<<$ circle.calculatePerimeter$()<<$ std::endl;

std::cout $<<$ "Enter the side length of the square: $"$;

std::cin $>>$ side;

Square square$($side$)$;

std::cout $<<$ "Square Area: $"<<$ square.calculateArea$()<<",$ Perimeter: $"<<$ square.calculatePerimeter$()<<$ std::endl;

return $0$;

$\}$