keep getting a sum of 0

I have tried several times to make minor tweaks to the program, but nothing seems to work, i finally ended with

Code:

double Mean(vector<double> L)
{  
   double sum=0;
   vector<double> list1;
   
   for(int i=0;i<list1.size();i++)
   {sum=sum+list1[i];}
   
   return sum;
}

as soon as i can figure out how to get a value other than 0, i will add in the "/list1.size()" after the return sum line.

You are adding up elements in an empty vector, what did you expect?

May-be you meant to add up items in the vector called L.

Thank you anon, i changed all my L's to list1 and that fixed the problem, i hate minor problems like that that cause major headaches

there is no reason to use list1, just use L

i would, but im already using L in L_side for a different part of my program, and it was easier to keep things organized with just calling it list1

If I may ask, what did you do with the vector originally called list1?

i was trying to use it to calculate the mean and median of a set of numbers, however there was nothing in it, so it was never working. everything works fine on it now