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68 lines
926 B
Go
68 lines
926 B
Go
package main
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import (
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"fmt"
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"math"
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//"math"
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)
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type geometry interface {
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area() float64
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perim() float64
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}
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type rect struct {
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width float64 `-line:"width"`
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height float64 `-line:"height"`
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}
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type rect2 struct {
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width int `yml:"width"`
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height int `yml:"height"`
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}
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func (r rect) area() float64 {
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return r.width * r.height
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}
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func (r rect) perim() float64 {
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return 2*r.width + 2*r.height
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}
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type circle struct {
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radius float64
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}
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func (c circle) area() float64 {
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return math.Pi * c.radius * c.radius
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}
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func (c circle) perim() float64 {
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return 2 * math.Pi * c.radius
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}
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func measure(g geometry) int {
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fmt.Println(g)
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fmt.Println(g.area())
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fmt.Println(g.perim())
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return 1
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}
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func m2() {
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measure(rect{width: 3})
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}
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func M2() {
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measure(rect{width: 3})
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}
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func interfaceTest() {
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r := rect{width: 3, height: 4}
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c := circle{radius: 5}
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measure(r)
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measure(c)
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d := circle{radius: 10}
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fmt.Println()
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fun2(d)
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}
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