LEDA Guide: Bounded Stacks and Queues

Guide > Simple, Basic, and Advanced Data Types > Basic Data Types > Bounded Stacks and Queues

Bounded Stacks and Queues

The data type b_stack (b_queue) is a stack (queue) with bounded maximal size. The only element that can be accessed is the last (first) element added.

Example

The following program shows how to use a Bounded Queue. It generates a

b_queue 
      BQ

of int with at most 100 elements and appends the numbers 1 to 100 to BQ. Then it pops all elements from the queue and outputs them.

#include <LEDA/core/b_queue.h>

int main()
{
  leda::b_queue<int> BQ(100);

  int i;
  for (i=1; i<=100; i++) BQ.append(i);
  
  while (!BQ.empty()) {
    i=BQ.pop();
    std::cout << i << " ";
  }
  
  std::cout << std::endl;
  
  return 0;
}

Strengths

very simple data type
very fast (even faster than Stacks and Queues)
space efficient
direct access to last (first) element added

Disadvantages

set of operations is very restricted (no access to elements other than last (first) added, no searching, no iterating)
maximal size is bounded

Tips

Use Bounded Stacks and Queues whenever it is appropriate. If you do not know the maximal size beforehand, us a Stack/Queue.

Bounded Stacks and Queues

Example

Strengths

Disadvantages

Tips

See also: