如何修复Golang参数过多错误

Question

i am using following code...

package main

import (
"fmt"
)

type traingle interface {
area() int
}

type details struct {
height int
base   int
}

func (a details) area() int {

s := a.height + a.base
fmt.Println("the area is", s)
return s

}

func main() {
r := details{height: 3, base: 4}
var p1 traingle
p1.area(r)

}

not getting why getting following error

too many arguments in call to p1.area have (details) want ()

i am assuming that p1 object of triangle can call area() method with arguments. not getting why it is failing.

Answer 1

try this:

package main

import (
    "fmt"
)

type shape interface {
    area() int
}

type traingle struct {
    height int
    base   int
}

func (a traingle) area() int {
    return a.height * a.base / 2    
}

func main() {
    var p1 shape = traingle{height: 3, base: 4}
    fmt.Println(p1.area())
}

output:

6

and see this thread example on shape: https://stackoverflow.com/a/38818437/8208215

I hope this helps.