c++ how to remove filename from path string

Question

I have

const char *pathname = "..somepathsomemorepathsomefile.ext";

how to transform that into

"..somepathsomemorepath"

?

Answer 1

The easiest way is to use find_last_of member function of std::string

string s1("../somepath/somemorepath/somefile.ext");
string s2("..\somepath\somemorepath\somefile.ext");
cout << s1.substr(0, s1.find_last_of("\/")) << endl;
cout << s2.substr(0, s2.find_last_of("\/")) << endl;

This solution works with both forward and back slashes.