My Challenge Solution

Objective-C Programming (2nd Edition) 20. Inheritance
1

main.m

#import <Foundation/Foundation.h>
#import "BNRForeignStockHolding.h"

int main(int argc, const char * argv[])
{

    @autoreleasepool {
        // Create BNRStockHoldings
        BNRStockHolding *appl = [[BNRStockHolding alloc] init];
        BNRStockHolding *msft = [[BNRStockHolding alloc] init];
        BNRStockHolding *goog = [[BNRStockHolding alloc] init];
        BNRForeignStockHolding *ssnlf = [[BNRForeignStockHolding alloc] init];
        BNRForeignStockHolding *htc = [[BNRForeignStockHolding alloc] init];
        
        // Set Stock Variables
        [appl setPurchaseSharePrice: 60.0];
        [appl setCurrentSharePrice: 99.3];
        [appl setNumberOfShares: 10];
        [appl setName: @"APPL"];
        
        [msft setPurchaseSharePrice: 30.0];
        [msft setCurrentSharePrice: 33.5];
        [msft setNumberOfShares: 12];
        [msft setName: @"MSFT"];
        
        [goog setPurchaseSharePrice: 425.8];
        [goog setCurrentSharePrice: 400.0];
        [goog setNumberOfShares: 15];
        [goog setName: @"GOOG"];
        
        [ssnlf setPurchaseSharePrice: 1400.0];
        [ssnlf setCurrentSharePrice: 1394.14];
        [ssnlf setConversionRate: .34];
        [ssnlf setNumberOfShares: 25];
        [ssnlf setName: @"SSNLF"];
        
        [htc setPurchaseSharePrice: 141.5];
        [htc setCurrentSharePrice: 140.0];
        [htc setNumberOfShares: 150];
        [htc setConversionRate: .80];
        [htc setName: @"HTC"];
        
        // Create Stock Portfolio and add BNRStockHoldings
        NSMutableArray *stockPortfolio = [[NSMutableArray alloc] init];
        [stockPortfolio addObject: appl];
        [stockPortfolio addObject: msft];
        [stockPortfolio addObject: goog];
        [stockPortfolio addObject: ssnlf];
        [stockPortfolio addObject: htc];
        
        for(BNRStockHolding *stock in stockPortfolio)
        {
            NSString *name = [stock name];
            float purchasePrice = [stock purchaseSharePrice];
            float currentPrice = [stock currentSharePrice];
            int numberOfShares = [stock numberOfShares];
            float cost = [stock costInDollars];
            float currentValue = [stock valueInDollars];

            NSLog(@"%@: ", name);
            NSLog(@"Purchase price: $%.2f\n", purchasePrice);
            NSLog(@"Current Price: $%.2f\n", currentPrice);
            NSLog(@"Number of shares: %d\n", numberOfShares);
            NSLog(@"Cost in dollars: $%.2f\n", cost);
            NSLog(@"Current value: $%.2f\n\n", currentValue);
        } 
    }
    return 0;
}

BNRStockHolding.h

#import "BNRStockHolding.h"

@interface BNRForeignStockHolding : BNRStockHolding

@property (nonatomic) float conversionRate;

@end

BNRForeignStockHolding.h

#import "BNRForeignStockHolding.h"

@implementation BNRForeignStockHolding

- (float)costInDollars {
    float purchaseSharePrice = [self purchaseSharePrice];
    float conversionRate = [self conversionRate];
    int numberOfShares = [self numberOfShares];
    
    return purchaseSharePrice * conversionRate * numberOfShares;
}

- (float)valueInDollars {
    float currentSharePrice = [self purchaseSharePrice];
    float conversionRate = [self conversionRate];
    int numberOfShares = [self numberOfShares];
    
    return currentSharePrice * conversionRate * numberOfShares;
}

@end

Ok I don’t think I need to include foundation in main since it’s already included in BNRForeignStockHolding.h but I could be wrong… What is the standard for includes that are already included in your classes?