Question

How to change the last element in deque in C++

Answer 1

#include <iostream>
#include <deque> 
  
int main ()
{
   std::deque<int> dq = {5, 2, 9, 12, 7, 1, 6}; 
    
   std::deque<int>::iterator it = dq.end() - 1;
    
   *it = 100;
   for (int &n : dq) std::cout << n << ", ";
   
   std::cout << "\n";

   dq[dq.size() - 1] = 33;
   for (int &n : dq) std::cout << n << ", ";
  
   return 0;
}
    
    
    
    
/*
run:
    
5, 2, 9, 12, 7, 1, 100, 
5, 2, 9, 12, 7, 1, 33, 
     
*/

 

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