13.17. Exercises
13-1. Programming. Name some benefits of object-oriented programming over older forms of programming.
13-2. Functions vs. Methods. What are the differences between functions and methods?
13-3. Customizing Classes. Create a class to format floating point values to monetary amounts. In this exercise, we will use United States currency, but feel free to implement your own.
Preliminary work: Create a function called dollarize() which takes a floating point value and returns that value as a string properly formatted with symbols and rounded to obtain a financial amount. For example: dollarize(1234567.8901) ⇒ '$1,234,567.89' The dollarize() function should allow for commas, such as 1,000,000, and dollar signs. Any negative sign should ...
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