Assignment 3   due____________________________         CIS 15


Write and run under Unix a program to do the following:

1. Define N  10

  	  A    5

2. Send N to a function that calculates and returns the sum of the first N integers.

3. Use a parameterized  macro calculate N * (N+1) / 2.
     Can you explain why  this formula works?

4. If the two results are equal, print this value (in good style).  Otherwise, print "OOPS".

5. Repeat steps 2, 3 and 4 using A instead of N.