test_horner2d.c running 
npowwer=0, nterm=1, x=2.500000, y=3.300000 
horner2d=66.000000, check=66.000000, err=0 

npowwer=1, nterm=3, x=2.500000, y=3.300000 
horner2d=439.700000, check=439.700000, err=0 

npowwer=2, nterm=6, x=2.500000, y=3.300000 
horner2d=2009.240000, check=2009.240000, err=2.27374e-13 

npowwer=3, nterm=10, x=2.500000, y=3.300000 
horner2d=7791.074000, check=7791.074000, err=-9.09495e-13 

test_horner2d.c finished