#include <iostream>
#include <cmath>
#include <string>
using namespace std;

// file: getgradealt.cpp
// demo a function that returns a string value
// demo cascaded else/if style
// nested function invocation
// functions that return values

string Grade(double score)
{
   if (score > 90.0) return "A" ;
   else if (score > 80.0) return "B" ;
   else if (score > 70.0) return "C" ;
   else if (score > 60.0) return "D" ;
   else return "F" ;
}

double Curve(double score)
{
   return 10.0 * sqrt(score);
}

int main()
{
   double grade;

   cout << "Enter your numberic grade: ";
   cin >> grade;

   cout << "Your raw grade is: " << Grade(grade) << endl;
   cout << "Your curved grade is: " << Grade(Curve(grade)) << endl;

   return 0;
}

/*

Sample output:

prompt> getgradealt
Enter your numberic grade: 56
Your raw grade is: F
Your curved grade is: C

prompt> getgradealt
Enter your numberic grade: 45
Your raw grade is: F
Your curved grade is: D

prompt> getgradealt
Enter your numberic grade: 80
Your raw grade is: C
Your curved grade is: B
 
*/