.cpp
int frequency(std::vector<int> &v, int n)
{
int freq = std::count(v.begin(), v.end(), n);
std::cout << "Element " << n << " occurs " << freq << " times";
return freq;
}
int frequency(std::vector<int> &v, int n)
{
int freq = std::count(v.begin(), v.end(), n);
std::cout << "Element " << n << " occurs " << freq << " times";
return freq;
}