CODEWITHSUNDEEP
c++listdata-structuresstlstack
Jayram
Jayram

Reputation: 19578

Using STL's list object for Stack creation

I want to create a list of stacks in C++ but the compiler gives me some error messages: 

 #include <list>
    #include <stack>

    class cName
    {
        [...]
        list<stack> list_stack;
        [...]
    }

Errors:

error C2143: syntax error : missing ';' before '<'

error C4430: missing type specifier - int assumed. Note: C++ does not support default-int

error C2238: unexpected token(s) preceding ';'

Upvotes: 2

Views: 135

Answers (3)

Ari
Ari

Reputation: 3127

If you want your stack to handle just one type, for example int, change stack in your code to int:

list<int> list_stack;

Otherwise you should create your own template type instead of using stack:

template <class T> 
class List
{
    list<T> list_stack;

    T top();
    void push(T v);
};

Upvotes: 1

billz
billz

Reputation: 45410

std::stack is a template, you need to use it with template arguments. For sample:

class cName
{
  typedef int ConcreteType;
  std::list<stack<ConcreteType> > list_stack;
                  ^^^^ use it with real type
};

Upvotes: 4

David says Reinstate Monica
David says Reinstate Monica

Reputation: 20129

Stacks are also templated, so it should be

list<stack <...> > list_stack;

Upvotes: 1

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