Differential Equation Plotter

As a project for computer course, one of the projects was to develop an program that can be used for some purpose. I tried my luck for a simple differential equation plotter program, that can plot any set of ODE (Ordinary Differential Equation). The basic idea is, if we can reduce any differential equation to set of equation with only first derivative on one side(even if increasing the number of variables in the process) we can approximate it with straight lines for small units of time. Then simple Euler method gives the rest of the graph for some time. In general it works quiet fine, but then due to limitation of Euler method the plot also is flawed. But still it is a good start for studying them.