Launching without filepath #369
Description
The code in launchff++.cpp is flawed if the command is not issued with a full file path.
For example: lauchff.exe C:\path_to_some_file
The code grabs argv[0] ( "launchff.exe") , passes it to a function to determine the directory, and appends "\freefem++.exe". This works fine as long as there is a backslash in argv[0], but fails in this case, producing a path of "launchff.exe\freefem++.exe".
The function to extract the directory should return "" if there is not a backslash, not the entire string. Secondly, the main function should append the "\" only if the returned string was not of length 0.