example2_fall_through_behavior.cpp

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#include <iostream>

int main() {
    char grade;
    std::cout << "Enter your grade (A, B, C, D, or F): ";
    std::cin >> grade;

    switch (grade) {
        case 'A':
        case 'B':
        case 'C':
            std::cout << "You passed!";
            break;
        case 'D':
            std::cout << "You barely passed.";
            break;
        case 'F':
            std::cout << "You failed.";
            break;
        default:
            std::cout << "Invalid grade entered.";
    }

    std::cout << std::endl;
    return 0;
}