delete element from list

[arvind.nm]

hi,
if i create a linked list like list<char> stk;
if i want to remove the first element from the list and i write
stk.pop_front() the node is still present but the char stored is now
'\0',why? how can i delete the first node. will
stk.erase(stk.begin()) work?

 

[ravinderthakur]

hi

this will work.

plz see


http://support.microsoft.com/kb/q158085/

for the same.

thanks
rt

 

[msalters]

(e-mail address removed) schreef:

hi,
if i create a linked list like list<char> stk;
if i want to remove the first element from the list and i write
stk.pop_front() the node is still present but the char stored is now
'\0',why?

When you create the linked list like you do, it's empty. If you then
try to remove an element, you get Undefined Behavior. Anything is OK.
If on your compiler the result is size()==1 and front()==\0, then
that's what UB meant - on that occasion. Don't count on it, UB is
unpredictable in the extreme.

Solution: before removing the first element, check if it exists.
( !empty() )

HTH,
Michiel Salters

 

[Andrew Koenig]

if i create a linked list like list<char> stk;
if i want to remove the first element from the list and i write
stk.pop_front() the node is still present but the char stored is now
'\0',why? how can i delete the first node. will
stk.erase(stk.begin()) work?

Please show us some code that you think is not working correctly. It's hard
to make sense of your description of the problem.