QUAD_MPI
  C++/MPI version
  Estimate an integral of f(x) from A to B.
  f(x) = 50 / (pi * ( 2500 * x * x + 1 ) )

  A = 0
  B = 10
  N = 9999997
  EXACT =       0.4993633810764567

  Use MPI to divide the computation among
  multiple processes.
  Process 1 contributed MY_TOTAL = 0.495552
  Process 4 contributed MY_TOTAL = 0.000371355
  Process 5 contributed MY_TOTAL = 0.000222815
  Process 3 contributed MY_TOTAL = 0.000742698
  Process 7 contributed MY_TOTAL = 0.000106103
  Process 2 contributed MY_TOTAL = 0.00222791
  Process 6 contributed MY_TOTAL = 0.000148544

  Estimate =       0.4993709939550049
  Error = 7.612878548224344e-06
  Time = 0.1526169776916504

QUAD_MPI:
  Normal end of execution.