switch example through student grades

03.Grades.cpp

// 03.grades.cpp
// Switch example through student grades
#include <iostream>
#include <cctype>
using namespace std;

int main( )
{
    char grade;

    cout << "Enter your control grade (A, B, C, D, E or F): ";
    cin >> grade;

    switch (toupper(grade))
    {
        case 'A':
            cout << "Excellent. "
                 << "You need not take the final.\n";
            break;
        case 'B':
            cout << "Very good. ";
            grade = 'A';
            cout << "Your midterm grade is now "
                 << grade << endl;
            break;
        case 'C':
            cout << "Passing.\n";
            break;
        case 'D':
        case 'F':
            cout << "Not good. "
                 << "Go study.\n";
            break;
        default:
            cout << "That is not a possible grade.\n";
    }

    return 0;
}