74 lines
1.2 KiB
Go
74 lines
1.2 KiB
Go
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package main
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import "fmt"
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import "math"
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type Rectangle struct {
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x1, y1, x2, y2 float64
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}
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func (r *Rectangle) length() float64 {
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return distance(r.x1, r.y1, r.x1, r.y2)
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}
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func (r *Rectangle) width() float64 {
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return distance(r.x1, r.y1, r.x2, r.y1)
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}
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func (r *Rectangle) area() float64 {
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return r.length() * r.width()
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}
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func (r *Rectangle) perimeter() float64 {
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return 2*r.length() + 2*r.width()
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}
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type Circle struct {
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x float64
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y float64
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r float64
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}
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func (c *Circle) area() float64 {
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return math.Pi * c.r * c.r
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}
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func (c *Circle) perimeter() float64 {
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return 2 * math.Pi * c.r
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}
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type Shape interface {
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area() float64
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perimeter() float64
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}
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type MultiShape struct {
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shapes []Shape
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}
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func (m *MultiShape) area() float64 {
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var area float64
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for _, s := range m.shapes {
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area += s.area()
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}
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return area
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}
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func (m *MultiShape) perimeter() float64 {
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var perimeter float64
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for _, s := range m.shapes {
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perimeter += s.perimeter()
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}
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return perimeter
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}
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func distance(x1, y1, x2, y2 float64) float64 {
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a := x2 - x1
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b := y2 - y1
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return math.Sqrt(a*a + b*b)
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}
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func main() {
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c := &Circle{x: 1, y: 1, r: 4}
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r := &Rectangle{x2: 4, y2: 10}
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ms := MultiShape{[]Shape{c, r}}
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fmt.Println("Area", ms.area())
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fmt.Println("Perimeter", ms.perimeter())
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}
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