1、代码
2、运行
1、代码
package main
import "fmt"
type Rect struct {
x, y float64
width, height float64
}
func (r * Rect) Area() float64 {
return r.width * r.height
}
func Init() {
rect1 := new(Rect)
rect2 := &Rect{}
rect3 := &Rect{0, 0, 100, 200}
rect4 := &Rect{width : 100, height : 200}
ShowRect(rect1)
ShowRect(rect2)
ShowRect(rect3)
ShowRect(rect4)
}
func NewRect(x, y, width, height float64) * Rect {
return &Rect{x, y, width, height}
}
func ShowRect(rect * Rect) {
fmt.Println(rect.x, rect.y, rect.width, rect.height)
}
func main() {
Init()
var rect *Rect = NewRect(1.0, 2.0, 3.0, 4.0)
ShowRect(rect)
fmt.Println("area = ", rect.Area())
}
2、运行
$ go run struct.go
0 0 0 0
0 0 0 0
0 0 100 200
0 0 100 200
1 2 3 4
area = 12