#include <iostream>

using namespace std;

int main()
{

  int grade1, grade2, grade3, grade4, grade5;
  int i;


  for (i=1;i<=5;i++) {
    cout << "Input grade " << i << ": ";
    if (i==1) cin >> grade1;
    if (i==2) cin >> grade2;
    //..
  } 

  float average = (static_cast<float>(grade1+grade2+grade3+grade4+grade5)/5);

  cout << "The average grade is " << average << endl;

  return 0;
}