#include <iostream>
using namespace std;

int main(int argc, char* argv[])
{

     // GOOD PRACTICE: use const int variable to hold size
     //   -- modifications in size require changing one place only
     //   -- const prevents inadvertent modifications
     const int NUMBER_OF_TESTS = 5;
     
     double testGrades[NUMBER_OF_TESTS];
     int index;
     double testSum = 0;
     double testAverageScore;

     cout << "Test Grade Analysis Program" << endl;
     cout << "Please enter the " << NUMBER_OF_TESTS << " grades, separated by spaces: ";

     // typical to use a for loop to iterate over positions in array
     // check bounds carefully! 0 - (size-1)
     for (index = 0; index < NUMBER_OF_TESTS; index = index+1)
     {
          cin >> testGrades[index];
     }

     for (index = 0; index < NUMBER_OF_TESTS; index = index + 1)
     {
         testSum = testSum + testGrades[index];
     }

     testAverageScore = testSum / NUMBER_OF_TESTS;
     cout << "Test average was " << testAverageScore << endl;
}