sizeof(float)= 4        sizeof(float_complex)= 8
sizeof(double)= 8       sizeof(double_complex)=16
sizeof(long double)=12  sizeof(long_double_complex)=24
(1+2i)+(2+2i)+10 = 13+4i
(2+3i) * (5+6i) = -8+27i
(-8+27i) / (5+6i) = 2+3i
exp(pi*i) = -1.000000+-0.000000i
complex log(-1) = 0.000000+3.141593i   (difference from pi=0)
abs(float_complex(3,4)) = 5.000000
e to the imaginary pi power = -1.000000+-0.000000i
i squared = -1.000000+0.000000i
(1+1i) to the power (1+1i) = 0.273957+0.583701i
square root of -1 = 0+1i
arg(1+1i) = 0.785398   (difference from pi/4=5.42101e-20)
conj(2+3i)) = 2+-3i
cos((1+1i)) = 0.833730+-0.988898i
sin((1+1i)) = 1.298458+0.634964i
tan((1+1i)) = 0.271753+1.083923i
cosh((1+1i)) = 0.833730+0.988898i
sinh((1+1i)) = 0.634964+1.298458i
tanh((1+1i)) = 1.083923+0.271753i