POISSON:
  C++ version
  A program for solving the Poisson equation.

  The number of interior X grid lines is 9
  The number of interior Y grid lines is 9

INIT_SERIAL:
  Max norm of exact solution U at interior nodes = 0.724287

INIT_SERIAL:
  Max norm of boundary values = 0.841471

INIT_SERIAL:
  Max norm of right hand side F at interior nodes = 1.17335

  The X grid spacing is 0.1
  The Y grid spacing is 0.1

Step    ||U||         ||Unew||     ||Unew-U||     ||Unew-Exact||

    1      0.403397      0.497847      0.144939        0.4921
    2      0.570316      0.604994     0.0631442      0.401573
    3      0.634317      0.651963     0.0422323      0.329583
    4      0.667575      0.678126     0.0308531      0.276557
    5      0.687708      0.694657     0.0230252      0.241842
    6      0.701077      0.705958     0.0185731      0.209427
    7      0.710522      0.714112      0.015431      0.180258
    8      0.717499      0.720232     0.0131014      0.154437
    9      0.722829      0.724966     0.0111636      0.135789
   10      0.727009      0.728717    0.00955924      0.119854
   11      0.730356      0.731745    0.00825889      0.105163
   12      0.733083      0.734229    0.00726878     0.0917109
   13      0.735336      0.736293     0.0064123     0.0794455
   14      0.737221      0.738029    0.00574042     0.0682936
   15      0.738814      0.739502    0.00514483     0.0581723
   16      0.740172      0.740762    0.00461455     0.0495549
   17      0.741339      0.741849    0.00414236     0.0426384
   18      0.742348      0.742791    0.00372159     0.0364693
   19      0.743225      0.743613    0.00334623     0.0308046
   20      0.743993      0.744333    0.00301095     0.0268309
   21      0.744667      0.744967    0.00271107     0.0290672
   22      0.745261      0.745526    0.00244252     0.0310488
   23      0.745787      0.746022    0.00220174     0.0328095
   24      0.746254      0.746463    0.00198562     0.0343777
   25      0.746669      0.746855    0.00179145     0.0357775
   26      0.747039      0.747205    0.00161683     0.0370291
   27      0.747369      0.747518    0.00145968     0.0381501
   28      0.747665      0.747799    0.00131972     0.0391554
   29       0.74793       0.74805    0.00119371     0.0400581
   30      0.748168      0.748276    0.00107972     0.0408695
   31      0.748382      0.748479   0.000976623     0.0417889

POISSON:
  The iteration has converged

POISSON:
  Normal end of execution.