CMPS 222 - Lab 3

Lab 3 - Adding Operators to Classes

The purpose of this lab is to define operators for a class.

Look at the score.cpp file that contains the Score class. You can copy it over to your current directory using:

wget http://www.cs.csubak.edu/~melissa/cs222/score.cpp

This is the Score class that we discussed in lecture, which will allow one to store integers greater than INT_MAX. This class currently has several helper functions and two operators defined, but it does not have the following basic operators needed to provide a standard interface. You will need to define these operators for the lab:

>> The input operator. It is a friend function that takes two parameters. The first parameter is the input stream. The second parameter is the class object. Input into a temporary integer and then use an if-else statement similar to the integer conversion constructor to set the counters.
<< The output operator. It is a friend function that takes two parameters. The first parameter is the output stream and the second parameter is the class object. Call the helper function formatScore() in the class object with the output stream as the argument to the member function.
+ The addition operator. It is a friend function that takes two parameters. It takes two class objects and returns a new class object that reflects the sum of the scores. This is somewhat like the += operator, but you are creating a new Score object to hold the sum instead of adding it into the current Score object. At the top of the function, declare a temporary Score object called temp. Then follow this pseudocode:
```
Set temp.million_counter equal to the sum of the two objects' millions' counters
Set temp.billion_counter equal to the sum of the two objects' billions' counters
Call temp.normalizeScore() in case the sum of the millions' counters is >= THRESHOLD
Return temp
```

The given main() function will NOT work until all three operators have been defined. Once you have defined the three operators, compile the program and then run it. Try giving large values (greater than 1 billion but less than 2.4 billion) when running the program. For example, if you give 2.1 billion for the first prompt and 1.3 billion for the second prompt, it should tell you that the new value of a is 3.4 billion if you have done the output operator correctly.

Email me your completed source code. Make sure both partners names are in the comment section if you worked with a lab partner.