Objective-C Programming: The Big Nerd Ranch Guide

Challenge

Create a new Foundation Command Line Tool called Stocks. Then create a class called BNRStockHolding to represent a stock that you have purchased. It will be a subclass of NSObject. For instance variables, it will have two floats named _purchaseSharePrice and _currentSharePrice and one int named _numberOfShares. Use properties to create accessor methods and instance variables. Create two other instance methods:

- (float)costInDollars;  // purchaseSharePrice * numberOfShares
- (float)valueInDollars; // currentSharePrice * numberOfShares

In main(), fill an array with three instances of BNRStockHolding. Then iterate through the array printing out the value of each.

Figure 18.4  An array of BNRStockHolding objects