Create HW4Intersectarea

Write a C++ program intersectArea.cpp which, given an unit circle (i.e., a circle with radius
r = 1.0) and a rectangle, computes and prints the area of their intersection with the precision of
four digits after the decimal point (round up if the fifth digit after the decimal point is greater than
or equal to 5). Your program should get its input from argv. The command line arguments are,
respectively, x1, y1, x2, y2, x3, y3, where (x1, y1) is the coordinate of the center of the circle, and
(x2, y2) and (x3, y3) are the coordinates of the lower-left and upper-right corners of the rectangle.
Example runs of valid input arguments are (the first line is the command line and the second line
is the expected output of your program).