Instance variable value in two objects of the same class (Objective C) - objective-c

Question

I am new at Objective C and ay programmer's world in general (2 or 3 weeks). Also I am Italian, and so It's quite difficult for me using english and the right terminology.
I created a class: "Mano" (Hand) with its instances and methods: m1 and m2.
My question is: How can I do to read m1 variables value with m2 ?
m1 and m2 have for example "int a; a=0;"
then m1, executing a method, sets a = 10
how can m2 read m1's a? Becouse if m2 simply reads a it reads his own a ... a=0, right?
Sorry again but I don't know how to explain myself better than this!

Answer 1

This was meant to be a simple RPS (Rock Paper Scissors) game just to start learning a little Objective C programming. In the beginning there were two objects m1 and m2 as the “Computer hand m1” and the “Player hand m2”.
Of course as you can see i joined the two methods (computer random number and human number choosing) so that all de job is made by just one object.
When methods were splitted I had problems in the [verdetto] (game results) methods because of m2 (jn my case) were not able to get the right value of the object instance (i needed m1 values) …
and that’s why I asked you my question!
Here you have 0=Rock 1=Scissors 2=Paper
// File main.m
#import <Foundation/Foundation.h>
#import "mano.h"
int main(int argc, const char * argv[])
{
int contatore;
contatore = 1;
#autoreleasepool {
mano *m1;
m1 = [[ mano alloc ] init ];
// mano *m2;
// m2 = [[ mano alloc ] init ];
while (contatore <= 5) {
NSLog(#"\n Partita N. %d", contatore);
contatore++;
[m1 gioco];
[m1 controlloRisultato]; }
// [m1 generatoreRandom] RANDOM NUMBER GENERATOR to let the computer choose
// [m2 scelta numero]here the player was meant to choose bw 0,1,2.
[m1 verdetto]; //game results
}
return 0;
}
// File mano.h
#import <Foundation/Foundation.h>
#interface mano : NSObject {
NSArray *simboli; //Rock Scissors Paper
NSInteger casuale; // Random Number
NSInteger scelta; // Player Number
NSInteger computer; // CPU wins
NSInteger giocatore; // Player Wins
NSInteger pareggi; // Draws
}
- (void) gioco;
- (void) controlloRisultato;
- (void) verdetto;
// - (void) generatoreRandom
// - (void) scelta numero
#end
// File mano.m
#import "mano.h"
#implementation mano
- (id) init {
self = [super init];
casuale = 0;
scelta = 0;
simboli = [ [ NSArray alloc] initWithObjects: #"Sasso",#"Forbici",#"Carta", nil]; //questo va nella init, giustamente, altrimenti non vale per tutti i metodi.
return self; }
- (void) gioco {
scelta =0;
casuale =0;
casuale = arc4random_uniform(3); //il computer sceglie un numero
// L'utente fa la sua scelta qui sotto
do {
NSLog (#"\n \n Inserisci 0 per Sasso, 1 per Forbici, 2 per Carta");
scanf ("%ld", &scelta);
if (scelta >2 || scelta <0) NSLog (#" \n Hai inserito un numero NON VALIDO");
} while (scelta >2 || scelta <0);
}
- (void) controlloRisultato {
NSLog(#"\nIl computer ha scelto: %#", [simboli objectAtIndex:casuale]);
NSLog(#"\nTu hai scelto: %#", [simboli objectAtIndex:scelta ]);
switch (casuale) {
case (0):
if (scelta == 0) {
NSLog (#"\n È un pareggio!");
++pareggi;
break;}
else if (scelta == 1) {
NSLog (#"\n Il Computer Vince!");
++computer;
break;}
else if (scelta == 2) {
NSLog (#"\n Hai vinto!");
++giocatore;
break;}
case (1):
if (scelta == 0) {
NSLog (#"\n Hai Vinto!");
++giocatore;
break;}
else if (scelta == 1) {
NSLog (#"\n È un pareggio!");
++pareggi;
break;}
else if (scelta == 2) {
NSLog (#"\n Il computer Vince!");
++computer;
break; }
case (2):
if (scelta == 0) {
NSLog (#"\n Il computer Vince!");
++computer;
break; }
else if (scelta == 1) {
NSLog (#"\n Hai Vinto!");
++giocatore;
break; }
else if (scelta == 2) {
NSLog (#"\n È un pareggio");
++pareggi;
break;}
break;
default:
break;
}
}
- (void)verdetto {
NSLog(#"\n Vittorie giocatore: %ld", giocatore);
NSLog(#"\n Vittorie computer: %ld", computer);
NSLog(#"\n Pareggi: %ld", pareggi);
if (giocatore > computer) NSLog(#"\n Bravo! Hai vinto tu la partita!");
else NSLog(#"\n Hai perso! Il computer ha vinto la partita");
}
#end

Answer 2

Same as you would if they were not the same kind of object, basically. First, make what you want to read public:
// Hand.h
#import <Foundation/Foundation.h>
#interface Hand : NSObject
// Each hand maintains a value
#property (assign) int a;
// This makes it easy to show two Hands working together...not necesary
- (instancetype)initAsFirst:(BOOL)first;
#end
Then, use a reference to one object from inside the other:
// Hand.m
#import "Hand.h"
#implementation Hand
// To start, some other object will call this with first set to YES.
- (instancetype)initAsFirst:(BOOL)first
{
self = [super init];
if (self) {
if (first) {
// The first Hand will create a second one to demonstrate the difference.
self.a = 0;
[self showHands:[[Hand alloc] initAsFirst:NO]];
} else {
// The second Hand will have a different value to prove that it's different.
self.a = 10;
}
}
return self;
}
- (void)showHands:(Hand *)h
{
// Display both the value of this hand (first) and the one this hand created (second)
NSLog(#"Mine: %d, Other: %d", self.a, h.a);
}
#end

Answer 3

now I have 1 class
#interface mani : NSObject
that maybe could control the game result.
and 2 subclasses:
#interface computer : mani //for random number generator
#interface giocatore : mani //for player choosing number
Now the matter for me is letting the first class (mani) read its subclasses variables, and do what to do to determine who is the winner! Still can't get how it works, and belive me, I am reading forums, and e-books!