Question

How to swap two deque elements 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> dq1 = { 5, 2, 9, 12 }; 
    std::deque<int> dq2 = { 7, 9, 13, 89 }; 
       
    dq1.swap(dq2);
       
    printdq(dq1);
    printdq(dq2);
     
    return 0; 
} 
     
     
     
/*
run:
     
7, 9, 13, 89, 
5, 2, 9, 12, 
     
*/

 

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