Get the last and first element from deque - C++ STL

C++ examples for STL:deque

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Description

Get the last and first element from deque

Demo Code

#include <iostream>
#include <deque>
using namespace std;
void show(const char *msg, deque<int> q);
int main() {/*from   ww  w.ja  v a 2s.  c o  m*/
   //Declare a deque that has an initial capacity of 10.
   deque<int> dq(10);
   for(unsigned i=0; i < dq.size(); ++i)
      dq[i] = i*i;
   cout << "The first and last element in dq as"
   << " pointed to by begin() and end()-1:\n"
   << *dq.begin() << ", " << *(dq.end()-1) << "\n\n";
   cout << "The first and last element in dq as"
   << " pointed to by rbegin() and rend()-1:\n"
   << *dq.rbegin() << ", " << *(dq.rend()-1) << "\n\n";
   return 0;
}
// Display the contents of a deque<int>.
void show(const char *msg, deque<int> q) {
   cout << msg;
   for(unsigned i=0; i < q.size(); ++i)
      cout << q[i] << " ";
   cout << "\n";
}

Result


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