This is a graphing program that draws a graph by darkening the area where two expressions are closest to equality. The expression calculator was done by boaz4, and I improved it a little, and modified it for the purpose of graphing. press E and enter an EQUATION, then press space to draw it. The sliders at the top will be useful. It will be slow without turbo, and probably with it as well. blue is normal, green means imaginary numbers were encountered when evaluating both results, red if only in one result. give this a try: sqrt((cos(atan(y/(-x))-sqrt(x^2+y^2))*sqrt(x^2+y^2))^2)+sqrt((cos(atan(x/y)-sqrt(x^2+y^2))*sqrt(x^2+y^2))^2)=100 Thanks to boaz4 for his expression evaluation algorithm.
