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4. Lab Exercise Overloading

Part 1

1. Change the sameDay function into a overloaded == operator. This will be a memberfunction as demonstrated in the notes. Remember that you will want to compare the month, day, and year.
2. Add an overloaded ++ operator (as a member function, shown in the notes)
3. Just for fun, change the printDate function into an overloaded << operator as a non-member. The prototype in the .h will look like this:

ostream& operator<<(ostream&, const Date&);

The function itself will look like this:

ostream& operator<<(ostream& os, const Date& myDate) { os << "Date is: " << myDate.getMonth() << "/" << myDate.getDay() << "/" << myDate.getYear() << endl; return os; }

4. Explain why operator<< must be overloaded as a non-member.

Part 2

Overload the + operator so that the following lines of code run in main:

 Date date3, date4; date3 = date1 + 82; date4 = 6 + date2;

More Details:

• Define two functions. The prototypes will look like this:
  

  Date operator+ (const Date&, int); Date operator+ (int, const Date&);

  Are they member or non-member functions? (Notice how many arguments they have)
  
  
• Both functions will create a temporary date and return it.
  
  
• Think about reusing as much code as possible.
  1. For one implementation of operator+, can you call the operator++ function?
  2. For the second implementation of operator+, can you call the first operator+ function?
  3. Together these two functions should be no more that 10 lines of code in the bodies. If you make it longer, you are working too hard.
     
     
• Which of the two functions must be defined as a non-member? Why?

Sample Run (after Part 2)

>./main Date is: 0/0/0 Please enter integer Year, Day, and Month separated by spaces: 1 1 1 Please enter integer Year, Day, and Month separated by spaces: 2 2 2 Date is: 1/1/1 Date is: 2/2/2 The dates are different. After incrementing Date is: 1/2/1 Date is: 2/3/2 After addition Date is: 1/2/1 Date is: 2/3/2 Date is: 3/25/1 Date is: 2/9/2