Question

How to insert element in deque with 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); 
     
    std::deque<int>::iterator it = dq.begin(); 
    it++; 
     
    dq.insert(++it, 200);  
   
    printdq(dq);
  
    return 0; 
} 
  
  
  
/*
run:
  
4 2 200 5 1 9 8 
  
*/

 

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