Question

How to find the uncommon elements from two vectors in C++

Answer 1

#include <algorithm>
#include <iostream>
#include <iterator>
#include <vector>

int main() {

    std::vector<int> v1 = { 1, 2, 3, 4, 5, 6, 7, 10 };
    std::vector<int> v2 = { 1, 4, 6, 8, 9 };
  
    std::sort(v1.begin(), v1.end());
    std::sort(v2.begin(), v2.end());

    std::vector<int> result; 
    std::set_symmetric_difference(v1.begin(), v1.end(), 
                                  v2.begin(), v2.end(), 
                                  std::back_inserter(result));

    std::copy(result.begin(), result.end(), std::ostream_iterator<int>(std::cout, " "));

}



/*
run:

2 3 5 7 8 9 10 

*/

 

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