#include <iostream> 
using namespace std; 
  
double calcAverage(int a, int b) 
{ 
  double result = 0.0; 
  result = (a + b) / 2.0; 
  return result; 
} // calcAverage 
  
int main() 
{ 
  int x = 100; 
  int y = 200; 
  double z = calcAverage(x, y); 
  cout << z << endl; 
} // main