| // 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 "CalculatedValues.h" |
| |
| #import "Equation.h" |
| |
| @implementation CalculatedValues { |
| NSMutableArray *_values; |
| } |
| |
| + (CalculatedValues *)sharedInstance { |
| static CalculatedValues *values = nil; |
| if (!values) { |
| values = [[[self class] alloc] init]; |
| } |
| return values; |
| } |
| |
| - (id)init { |
| self = [super init]; |
| if (self) { |
| _values = [NSMutableArray array]; |
| } |
| return self; |
| } |
| |
| - (NSArray *)values { |
| return [_values copy]; |
| } |
| |
| - (void)addEquation:(Equation *)equation { |
| [_values addObject: |
| [NSString stringWithFormat:@"%@ = %0.2lf", equation, [equation calculate]]]; |
| } |
| |
| @end |