// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#import <UIKit/UIKit.h>

@interface CalculatorViewController : UIViewController

- (IBAction)enterDigit:(id)sender;

- (IBAction)finish:(id)sender;

- (IBAction)operate:(id)sender;

@property (weak, nonatomic) IBOutlet UIButton *divideButton;
@property (weak, nonatomic) IBOutlet UIButton *multiplyButton;
@property (weak, nonatomic) IBOutlet UIButton *plusButton;
@property (weak, nonatomic) IBOutlet UIButton *minusButton;
@property (strong, nonatomic) IBOutletCollection(UIButton)
    NSArray *nonZeroDigitButtons;
@property (weak, nonatomic) IBOutlet UILabel *resultLabel;
@property (weak, nonatomic) IBOutlet UIButton *finishButton;
@property (weak, nonatomic) IBOutlet UIButton *zeroButton;

@end