c++ - Print the average of std::vector -

as title suggests i'm trying learn how print out average of vector. can done with:

int avgvec(const vector<int> & x) {    int sum=0;    for(int i=0; i<x.size(); ++i)     {     sum+=x[i];//sets sum vector size      }    return sum/x.size(); //now calculates average } 

has been set-up correctly?

now vector in question takes input user should set as:

vector<int> myvec; int i; { cin >> i; myvec.push_back(i); }while(i>0); 

has been set-up correctly?

now in order print average go making print function or after doing:

avgvec(myvec);  

i'd print out myvec, or have gone in wrong way? i've executed code , in fact compute average, first number inputed, makes average 1. feel i'm right there, 1 part not clicking.

this code snippet wrong

vector<int> myvec; int i; { cin >> i; myvec.push_back(i); }while(i>0); 

because enter 1 non-positive number last number of vector non-positive.

the valid code as

vector<int> myvec; int i; while ( cin >> && > 0 ) myvec.push_back(i); 

the function wrong because nothing prevents vector empty. write following way

int avgvec( const vector<int> & v ) {    int sum = 0;     ( int x : v ) sum += x;     return v.empty() ? 0 : sum / v.size(); }