KPNCalc will now do arithmetic with complex numbers. Complex numbers are to be be entered like those on an HP48 calculator. The numbers should be entered between parenteses with a comma between the real and imaginary numbers. Ex: 4+5i = (4,5). This would be done by pressing the '()' button, pressing the 4 button, pressing the ',' button, pressing the 5 button, and pressing the '()' button again.
Only simple arithmetic is supported at this time. Trig fuctions, logarithms and other more complex functions will be added as I do the research to find out how to compute them. It has been a while since my calculus days. If any body wish to send me these, please, feel free.