the path 21_interfaces/04_method-sets/04_pointer-receiver_value-type/main.go coding is error

[Toin1779712664]

the path 21_interfaces/04_method-sets/04_pointer-receiver_value-type/main.go coding is error

[Toin1779712664]

package main

import (
	"fmt"
	"math"
)

type circle struct {
	radius float64
}

type shape interface {
	area() float64
}

func (c *circle) area() float64 {
	return math.Pi * c.radius * c.radius
}

func info(s shape) {
	fmt.Println("area", s.area())
}

func main() {
	c := circle{5}    // this is error
        /*
             c:=&circle{5}
             or
             info(&c)
       */
	info(c)
}