Question

How to print deque in C++

Answer 1

#include <iostream> 
#include <deque> 
 
void printdq(std::deque <int> dq) { 
    for (std::deque <int> :: iterator it = dq.begin(); it != dq.end(); it++) 
        std::cout << *it << " "; 
    std::cout << '\n'; 
} 
   
int main() 
{ 
    std::deque<int> dq;
     
    dq.push_back(4); 
    dq.push_back(2); 
    dq.push_back(5); 
    dq.push_back(1); 
    dq.push_back(9); 
    dq.push_back(8); 
  
    printdq(dq);
 
     
    return 0; 
} 
 
 
 
/*
run:
 
4 2 5 1 9 8 
 
*/

 

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Answer 2

#include <iostream> 
#include <deque> 

void printdq(std::deque <int> dq) { 
    for (auto it = dq.begin(); it != dq.end(); ++it) 
        std::cout << *it << " "; 
    std::cout << '\n'; 
} 
    
int main() 
{ 
    std::deque<int> dq;
      
    dq.push_back(4); 
    dq.push_back(2); 
    dq.push_back(5); 
    dq.push_back(1); 
    dq.push_back(9); 
    dq.push_back(3); 
     
    printdq(dq);
  
    return 0; 
} 
  
  
  
/*
run:
  
4 2 5 1 9 3 
  
*/

 

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Answer 3

#include <iostream>
#include <deque> 
 
int main ()
{
   std::deque<int> dq = {5, 2, 9, 12, 7, 1, 6}; 
   
   for (int &n : dq) std::cout << n << ", ";
 
   return 0;
}
   
   
   
/*
run:
   
5, 2, 9, 12, 7, 1, 6, 
    
*/

 

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