#include <iostream>
#include <cstdarg> //?
using namespace std;
double getAvg(int count, ...) {
va_list args;
va_start(args, count);
double sum = 0;
for (int i = 0; i < count; i++)
{
sum += va_arg(args, double);
}
va_end(args);
return sum / count;
}
double avg = getAvg(4, 1.0, 2.0, 3.0, 4.0);
//avg is 2.5
cout << "avg is " << avg;