Question

How to remove elements of deque one by one in C++

Answer 1

#include <iostream> 
#include <deque> 
  
void printdq(std::deque <int> dq) { 
    for (auto &n: dq)
        std::cout << n << ", ";
    std::cout << '\n'; 
} 
  
int main() 
{ 
    std::deque<int> dq = { 5, 2, 9, 12, 7, 9, 13, 89 }; 
      
    while (!dq.empty()) {
        printdq(dq);
        dq.pop_front();
    }

    if (dq.empty()) {
        std::cout << '\n' << "deque is empty"; 
    }
    return 0; 
} 
    
    
    
/*
run:
    
5, 2, 9, 12, 7, 9, 13, 89, 
2, 9, 12, 7, 9, 13, 89, 
9, 12, 7, 9, 13, 89, 
12, 7, 9, 13, 89, 
7, 9, 13, 89, 
9, 13, 89, 
13, 89, 
89, 

deque is empty 

*/

 

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