GO语言练习：struct基础练习

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