Sample Bank Class

Bank.m

@interface Bank

@property (assign, nonatomic) int accountNumber;
@property (assign, nonatomic) float bankBalance;

@end


@implementation Bank

- (BOOL) enoughBalance:(float) amount {
   if ( self.amount > self.bankBalance )
       return NO;
   else
       return YES
}

- (float) makeWithdrawalWithAmount:(float) amount{
    if ( [self enoughBalance:amount] )
       return amount;
    else
       return 0.0;
}


@end