Modify a vector parameter

[rantiv]

Write a function SwapVectorEnds() that swaps the first and last elements of its vector parameter. Ex: sortVector = {10, 20, 30, 40} becomes {40, 20, 30, 10}. The vector's size may differ from 4.

I keep getting 40 30 30 40 as output

  void SwapVectorEnds(vector<int>& sectorVector){ 
int i = 0;
for ( i = 0; i < sectorVector.size() - 1; ++i) {
  sectorVector.at(i) = sectorVector.at(sectorVector.size() - 1 - i);
}
   return;
}

[ybf3AqkS]

void SwapVectorEnds(vector<int>& v)
{
    int t = v[0];
    v[0] = v[v.size()-1];
    v[v.size()-1] = t;
}

[rantiv]

Thanks!!!!

[Arslan7041]

You can condense the above answer by simply calling std::swap on front() and back()

std::swap(v.front(), v.back());