There's simple example:

#include <vector>

int main() {
 vector<int> veci;
 vector<double> vecd;

 for(int i = 0;i<10;++i){
  veci.push_back(i);
  vecd.push_back(i);
 }
 vecd = veci; // <- THE PROBLEM
}

The thing I need to know is how to overload operator = so that I could make assignment like this:

vector<double> = vector<int>;

I've just tried a lot of ways, but always compiler has been returning errors...

Is there any option to make this code work without changing it? I can write some additional lines, but can't edit or delete the existing ones. Ty.