One function passes a pointer to the value of interest to another function. Both functions can access the value of interest, but the value of interest itself is not copied. This communication is called shallow. The alternative where a complete copy is made and sent is known as a "deep" copy.
On Sat, Oct 1, 2011 at 7:36 PM, rahul sharma <rahul23111...@gmail.com>wrote: > plz give any c++ xample to xplain bit more > > > On Sat, Oct 1, 2011 at 6:59 PM, Bejoy kalikotay(sikkimesechora....) < > bijaykaliko...@gmail.com> wrote: > >> A shallow copy of an object copies all of the member field values. >> This works well if the fields are values, but may not be what you want >> for fields that point to dynamically allocated memory. The pointer >> will be copied. but the memory it points to will not be copied -- the >> field in both the original object and the copy will then point to the >> same dynamically allocated memory, which is not usually what you want. >> The default copy constructor and assignment operator make shallow >> copies. >> >> A deep copy copies all fields, and makes copies of dynamically >> allocated memory pointed to by the fields. To make a deep copy, you >> must write a copy constructor and overload the assignment operator, >> otherwise the copy will point to the original, with disasterous >> consequences. >> >> On Oct 1, 4:50 pm, rahul sharma <rahul23111...@gmail.com> wrote: >> > plz xpalin waht is deep and shallow copy in c++ >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Algorithm Geeks" group. >> To post to this group, send email to algogeeks@googlegroups.com. >> To unsubscribe from this group, send email to >> algogeeks+unsubscr...@googlegroups.com. >> For more options, visit this group at >> http://groups.google.com/group/algogeeks?hl=en. >> >> > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to algogeeks@googlegroups.com. > To unsubscribe from this group, send email to > algogeeks+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
