Chapter 12 Exercise Set 1

1. As you did back in the More structures chapter, rewrite the increment function from the Another example section more effeciently without iteration.

2. In the Initialize or construct? section, you defined a constructor for Times that had two integers and a double as parameters. The combination of function name and the ordered types of its parameters is known as the function signature. The C++ compiler uses this signature to determine which version of an overloaded function to call.

   Try creating a new Time with this constructor by passing it three int arguments:

   Time current_time(9, 14, 3);
   

   What happens? Now define a new constructor with the following

   Time(int h, int m, int s);
   

   Print out a different message inside each constructor so you can see which one was called. Create current_time again and run your program. What happens?

3. Use what you learned in this chapter to create a Fraction structure that has numerator and denominator instance variables, and print, plus, minus, times, and divided_by member functions. Give it two constructors, one that takes no arguments and creates a fraction with numerator set to 0 and denominator set to 1, and another which takes two integer arguments and initializes the numerator and denominator instance variables of the constructed object with them.

   Create both a Fraction.cpp and a Fraction.h header file, and write a program test_fraction.cpp to test your new fraction objects.