so im a newbie to c++, can anyone show me how to control cursor to delete and add characters to the right of it for any strings

C++ has no concept of a cursor. It reads and writes ASCII character data through IO streams (cin & cout). If you want to have interactive control over the characters you see on your monitor you have to use an external library like curses (or the newer ncurses and pdcurses versions).

There are some good links in here: http://www.cplusplus.com/forum/general/51564/