Question

How to pass struct to a function as pointer in Go

Answer 1

package main
 
import (
    "fmt"
)
 
type S struct {
    x, y float64
}
 
func (st *S) Add(f float64) {
    st.x = st.x + f
    st.y = st.y + f
}
 
func main() {
    st := S{2, 7}
    st.Add(10)
    fmt.Println(st.x, st.y)
}
 
 
 
/*
run:
 
12 17
 
*/

 

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Answer 2

package main

import (
	"fmt"
)

type S struct {
	x, y float64
}

func f(st *S, f float64) {
	st.x = st.x + f
	st.y = st.y +  f
}

func main() {
	st := S{3, 8}
	f(&st, 10)
	fmt.Println(st.x, st.y)
}



/*
run:

13 18

*/

 

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Answer 3

package main
  
import (
    "fmt"
)
  
type S struct {
    x, y float64
}
  
func (st *S) Add(f float64) {
    st.x = st.x + f
    st.y = st.y + f
}
  
func main() {
    st := &S{4, 6}
    st.Add(10)
    fmt.Println(st.x, st.y)
}
  
  
  
/*
run:
  
14 16
  
*/

 

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