08. Graduation

#include <iostream>
#include <string>

using namespace std;

int main() {
    string name;
    cin >> name;

    int failedExams = 0;
    int completedClass = 0;
    double sumGrades = 0, grade;

    while (completedClass < 12 && failedExams < 2) {
        cin >> grade;

        if (grade >= 4) {
            sumGrades += grade;
            completedClass++;
        }
        else {
            failedExams++;
        }
    }

    if (completedClass == 12) {
        printf("%s graduated. Average grade: %.2f\n", name.c_str(), sumGrades / 12);
    }
    else {
        printf("%s has been excluded at %i grade", name.c_str(), completedClass + 1);
    }
    return 0;
}

Решение с тернарен оператор:

#include <iostream>
#include <string>

using namespace std;

int main() {
    string name;
    cin >> name;

    int failedExams = 0;
    int completedClass = 0;
    double sumGrades = 0, grade;

    while (completedClass < 12 && failedExams < 2) {
        cin >> grade;

        sumGrades += grade >= 4 ? grade : 0;
        grade >= 4 ? completedClass++ : failedExams++;
    }

    completedClass == 12 ?
        printf("%s graduated. Average grade: %.2f\n", name.c_str(), sumGrades / 12) :
        printf("%s has been excluded at %i grade", name.c_str(), completedClass + 1);

    return 0;
}