Fraction Lab

INTRODUCTION TO PROGRAMMING IN C++
Kalamazoo College

FRACTION LAB^*

In this lab you will extend the Fraction class to handle subtraction, multiplication, and division.

Copy the Fraction program from the folder \\Dragon\cls_abrady\CS 420\fraction\. The program is contained in the files:
- Fraction.h
- Fraction.cpp
- TestFraction.cpp
Extend the Fraction class to support the two subtraction operators, -= and -. You will need to declare, define, and use the new operators.
- First add the declarations for the new operators to the Fraction class declaration in Fraction.h. Use the two addition operators as models. Make sure you also add the new operators to the class documentation at the top of the file.
- Use the definitions of the addition operators as models for your new function (operator) definitions in Fraction.cpp. Compile this file before proceeding to make sure that you have caught typos and other simple errors.
- Finally, add code to TestProgram.cpp to test the two new operators. Do your operators work with mixed fractions and integers? Do negative numbers work? How about zero? Be sure to tell the user what the expected results are so that the user knows whether or not the tests worked correctly.
Extend the Fraction class to support two multiplication operators (*= and *) and two division operators (/= and /). Be sure to provide both the declarations and the definitions of the operators, and to test them thoroughly.
Recall that division is the same thing as multiplying by the multiplicative inverse, i.e.,
```
     (w/x) / (y/z)
```
is equivalent to
```
     (w/x) * (z/y)
```

Print and save your modifications.

Print the Fraction header and implementation files (Fraction.h and Fraction.cpp) and your test program (TestFraction) when you are done. Remove the object code from the project. Copy the Fraction Lab folder from the Temp folder to your floppy disk. You should then remove the folder from the Temp folder on the C: drive.

Be sure to turn in your printouts.

If you have extra time, you can start work on the next programming project (due next week at the beginning of lab).

^*This lab is based on the lab from Chapter 2 of The Object Concept by Rick Decker and Stuart Hirshfield, International Thomson Publishing Company, 1995.