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circular link list in c++

69 New Member
I'm trying to built and array of circular link list but when I read the input file Ijust get a long link list instead of different list and after trying to use Linked_list_Sta ck *obj[arraysize]; I'm getting this errors
newcir.cpp:107: request for member `push' in `obj[i]', which is of
non-aggregate type `Linked_list_St ack*'
newcir.cpp:110: request for member `print_list' in `obj[i]', which is of
non-aggregate type `Linked_list_St ack*'
Oct 20 '06
103 16019
saraSS
69 New Member
sound like a plan I'm gonna work on that and let you know thanks
Oct 21 '06 #31
arne
315 Recognized Expert Contributor
sound like a plan I'm gonna work on that and let you know thanks
Yes, please do so. Sounds like quite an interesting assignment :)
Oct 21 '06 #32
saraSS
69 New Member
ok so I need to work the postfix evaluation with a stack and I'm ok I guess
how can I set a string to nul in c++?
I've seen something like this but does not work with c++

strset(postfix_ expression[count_2] = NULL);
Oct 21 '06 #33
arne
315 Recognized Expert Contributor
ok so I need to work the postfix evaluation with a stack and I'm ok I guess
how can I set a string to nul in c++?
I've seen something like this but does not work with c++

strset(postfix_ expression[count_2] = NULL);
Has postfix_express ion[count_2] type std::string? Then use member functions
clear() to remove all elements from the string, or
erase() to remove only specific elements.
Oct 22 '06 #34
saraSS
69 New Member
I want to initialize Postfix_express ion[100] to null but nothing work not even the clear() function
Oct 22 '06 #35
saraSS
69 New Member
and my get line function is not working either lol
give me like and infinite look just stuck there is
cin.getline(Pos tfix_expression ,80); why why? lol
Oct 22 '06 #36
arne
315 Recognized Expert Contributor
I want to initialize Postfix_express ion[100] to null but nothing work not even the clear() function
Clear() only applies to std::strings, of course, such as in

Expand|Select|Wrap|Line Numbers
  1. std::string a_string;
  2. a_string.clear();
  3.  
That's why I asked of which type Postfix_express ion is ...
Oct 22 '06 #37
saraSS
69 New Member
I'm using array of char for the postfix exprexion thinking that is gonna be easy to pop and pust every letter and do the operations but is getting complicated I got a lot confuse with the strings and that how can I do it with the char Postfix_express ion[100] and the get line
Oct 22 '06 #38
arne
315 Recognized Expert Contributor
and my get line function is not working either lol
give me like and infinite look just stuck there is
cin.getline(Pos tfix_expression ,80); why why? lol
Try something like

Expand|Select|Wrap|Line Numbers
  1. int main( void )
  2. {
  3.         std::cout << "Please enter a phrase: ";
  4.  
  5.         string txt;
  6.  
  7.         getline( cin, txt );
  8.  
  9.         std::cout << txt << std::endl;
  10.  
  11.         return 0;
  12. }
  13.  
and copy the relevant parts into your code (if this works) ...
Oct 22 '06 #39
arne
315 Recognized Expert Contributor
I'm using array of char for the postfix exprexion thinking that is gonna be easy to pop and pust every letter and do the operations but is getting complicated I got a lot confuse with the strings and that how can I do it with the char Postfix_express ion[100] and the get line
You mean for the UUUUUIab... stuff? You can do most (all?) things with std::string that you can do with char[]. You can even convert the read-in string to an char[] by calling std::string::c_ str().

But char[] works, too:
Expand|Select|Wrap|Line Numbers
  1. int main( void )
  2. {
  3.     char txt[100];
  4.  
  5.         std::cout << "Please enter a phrase: ";
  6.     cin.getline( txt, 100 );
  7.  
  8.     cout << txt << endl;
  9.  
  10.     return 0;
  11. }
  12.  
Oct 22 '06 #40

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