package main
import "fmt"
type Shape interface {
Area() float64
}
type Circle struct {
Radius float64
}
func NewCircle(radius float64) *Circle {
return &Circle{Radius: radius}
}
func (c Circle) Area() float64 {
return 3.14 * c.Radius * c.Radius
}
type Rectangle struct {
Width float64
Height float64
}
func NewRectangle(width, height float64) *Rectangle {
return &Rectangle{Width: width, Height: height}
}
func (r Rectangle) Area() float64 {
return r.Width * r.Height
}
func CalculateArea(s Shape) {
fmt.Printf("Area: %f\n", s.Area())
}
func main() {
circle := NewCircle(5.0)
rectangle := NewRectangle(4.0, 6.0)
CalculateArea(circle)
CalculateArea(rectangle)
}
