By pressing F8 key then there's a window appears and there 
we have to write all the variables that we had used so far 
in the programme and press enter then the initial values of 
those variables taken as garbage if the variable not 
assigned any value or the assigned value will be displayed 
at bottom of the code seperated by a line.
     By pressing F8 Key continuesly debugging will be 
happened and somme times output screen also will appear and 
the values of variables also changed according to the logic.
This is the debugging process in c++ as well as c also.