62 lines
1.0 KiB
Go
62 lines
1.0 KiB
Go
package main
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import "fmt"
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// 定义一个接口
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type Shape interface {
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Area() float64
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}
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// 定义一个结构体：Rectangle
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type Rectangle struct {
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Width, Height float64
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}
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// 实现接口方法：Area
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func (r Rectangle) Area() float64 {
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return r.Width * r.Height
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}
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// 定义另一个结构体：Circle
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type Circle struct {
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Radius float64
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}
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// 实现接口方法：Area
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func (c Circle) Area() float64 {
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return 3.14 * c.Radius * c.Radius
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}
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func main() {
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// 创建接口类型的切片
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shapes := []Shape{
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Rectangle{Width: 10, Height: 5},
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Circle{Radius: 7},
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}
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shapes2 := []Shape{
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Rectangle{Width: 20, Height: 10},
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Circle{Radius: 14},
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Rectangle{Width: 30, Height: 15},
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Rectangle{5, 5},
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}
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// 遍历并调用接口方法
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for _, shape := range shapes {
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fmt.Printf("Shape Area: %.2f\n", shape.Area())
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}
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// i := 0
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// for {
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// fmt.Printf("Shape Area: %.2f\n", shapes2[i].Area())
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// i++
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// if i >= len(shapes2) {
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// break
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// }
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// }
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for _, shape := range shapes2 {
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fmt.Printf("%.2f\n", shape.Area())
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}
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}
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