Need help with C++ form!!!  I have to do a program that consists
of the following requirements. From what I can gather i have to
create a program that calculates the area of three edges,
produced from a separate text file, of a triangle but produces
the results in another text file:  The area of an arbitrary
triangle can be computed using the formula:  where a, b, and c
are the lengths of the sides, and s is the semiperimeter. s =
(a+b+c)/2  the information supplied in the edges.txt file is:
12 15 7 8 9 14 11 2 15 6 5 4 18 7 10 16 11 17  However, not all
three integers a, b, and c will produce a triangle. This is
because for any triangle the sum of the lengths of any two edges
shall be greater than the length of the remaining edge. In this
assignment, the lengths of edges are grouped and stored in a
file named “edges.txt”. Each line of the file contains a group
of three edges, which may or may not produce a triangle as
discussed above. Your program reads each group of three edges
from the file and determines