i have done my bms and bca side by side,but i want a career in mobile application development,i want a course to teach me c c++ please help

my majority of time was spent in doing BMS but i mostly enjoy doing something in mobile application and for which i require a strong base of C AND C++ , because in my institute of BCA i dont understand the language of C AND C++ AND thier usage on a large scale , though i know some basics.