package basic import ( "fmt" "testing" ) func TestPrintAddress(t *testing.T) { var a int fmt.Printf("%T, %v, %p \n", a, a, &a) passByVariable(a) passByPointer(&a) } func passByVariable(a int) { fmt.Printf("%T, %v, %p \n", a, a, &a) } func passByPointer(a *int) { fmt.Printf("%T, %v, %p \n", a, a, &a) fmt.Printf("%T, %v, %p \n", *a, *a, &*a) } type robot struct{} func TestStructAddress(t *testing.T) { var a robot fmt.Printf("%T, %v, %p \n", a, a, &a) passStructByVariable(a) passStructByPointer(&a) } func passStructByVariable(a robot) { fmt.Printf("%T, %v, %p \n", a, a, &a) } func passStructByPointer(a *robot) { fmt.Printf("%T, %v, %p \n", a, a, &a) fmt.Printf("%T, %v, %p \n", *a, *a, &*a) }