Example (Go) - Pointers

module example.com/pointers

go 1.22.0

package main

import "fmt"

func main() {
	age := 32 //! regular variable

	var agePointer *int
	agePointer = &age //! pointer variable

	fmt.Println("Age:", *agePointer)

	// adultYears := getAdultYears(agePointer)
	// adultYears := getAdultYears(age)
	// fmt.Println("Adult years:", adultYears)

	editAgeToAdultYears(agePointer)
	fmt.Println("Adult years:", age)
}

func editAgeToAdultYears(age *int) {
	*age = *age - 18
}

func getAdultYears(age *int) int {
    // ====cannot perform pointer arithmetic in Go====
    return *age - 18
}

// func getAdultYears(age int) int {
//     return age - 18
// }