/*
* Even pointers in Go have zero values!!!
* the "zero value" is "nil"
@ @author gtowell
* created July 28, 2021
*/
package main

import (
	"fmt"
)

// A struct
// the zero-ing of a structure is the zeroing of all of the elents of the structure
type Temp struct {
    ttt int
    ptr *int
}
func (t Temp) String() string {
    return fmt.Sprintf("ttt:%d  ptr:%v", t.ttt, t.ptr);
}
 
func main() {
    var pnt *Temp       // pointer
    tmp0 := Temp{}
    pnt1 := &tmp0

    fmt.Printf("pnt is a nil pointer: %v  %p\n", pnt == nil, pnt)
    fmt.Printf("pnt1 is a nil pointer: %v  %p\n", pnt1 == nil, pnt1)
    fmt.Printf("tmp0 -- each part is initialized to a \"zero\" value %v\n", tmp0)
    fmt.Printf("tmp0.ptr is also a nil pointer: %v\n", tmp0.ptr == nil)
}