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#include <iostream>
using namespace std;

int main() {
   const double HOMEWORK_MAX = 80.0;
   const double MIDTERM_MAX = 40.0;
   const double FINAL_MAX = 70.0;
   const double HOMEWORK_WEIGHT = 0.20; // 20%
   const double MIDTERM_WEIGHT = 0.30;
   const double FINAL_WEIGHT = 0.50;

   double homeworkScore;
   double midtermScore;
   double finalScore;
   double coursePercentage;

   cout << "Enter homework score:" << endl;
   cin  >> homeworkScore;

   cout << "Enter midterm exam score:" << endl;
   cin  >> midtermScore;

   cout << "Enter final exam score: " << endl;
   cin  >> finalScore;

   coursePercentage = ((homeworkScore / HOMEWORK_MAX) * HOMEWORK_WEIGHT)
                    + 0.0  // FIXME for midterm
                    + 0.0; // FIXME for final 
   coursePercentage = coursePercentage * 100; // Convert fraction to %

   cout << endl << "Your course percentage (FIXME): ";
   cout << coursePercentage << endl;

   return 0;
}