You can have the code call uigetdir() if you want to prompt the user for the directory name.
Or you can make the main function into one that accepts one or more argument, and then if someone used the executable name and then the directory name on the Windows command line, then the function would receive the directory name as a parameter.
Caution: it is not uncommon in Windows for directory names to have spaces in them, but it the user were to command, for example
PlotOde.exe C:\Users\Sam\Assignment 7\Odes
then the part before the 7 would be one parameter, and the 7 on would be a second parameter. Windows would consider the space as the end of the parameter unless you make sure to use double-quotes to tell Windows to treat it as a single parameter.
