Question

How to use range constructor to initialize an unordered set from elements of an array in C++

Answer 1

#include <iostream>       
#include <unordered_set> 
          
void printSet(std::unordered_set<int> st) {
    for (auto n: st) {
        std::cout << n << ' ' ; 
    } 
}
   
int main ()
{
    int arr[] = { 5, 1, 4, 2, 3, 6 };
    std::unordered_set<int> st(std::begin(arr), std::end(arr));

    printSet(st); 
       
    return 0;
} 
      
  
      
      
/*
run:
      
6 3 2 4 1 5 
   
*/

 

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