Question

How to get deque front and back values in C++

Answer 1

#include <iostream> 
#include <deque> 

void printdq(std::deque <int> dq) { 
    std::deque <int> :: iterator it; 
    for (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);
    std::cout << dq.front() << "\n"; 
    std::cout << dq.back() << "\n"; 
    
    return 0; 
} 



/*
run:

4 2 5 1 9 8 
4
8

*/

 

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