#include <iostream>
using namespace std;



int Sum(int a, int b, int c)		// declaration and definition
{
   int r = a + b + c;
   return r;
}

double Average(int x, int y, int z)
{
   double total = Sum(x,y,z);
   double answer = total / 3.0;
   return answer;
}

int main()
{
   int q, w, e;

   cout << Sum(3, 5, 7);
   cout << "Type 3 numbers: ";
   cin >> q >> w >> e;
   int answer;
   answer = Sum(q, w, e);			// 

   cout << "Sum = " << answer << '\n';   
}