untitled4.cpp - master - Feltel/Zadania

untitled4.cpp
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Feltel
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28 окт 2025, 07:36
28 окт 2025, 07:36244caa6
#include <iostream>
#include <vector>
#include <algorithm>
#include <iomanip>
using namespace std;
struct Student {
	string surname;
	char initial;
	string studentID;
	int examScores[4];
	
	double averageScore() const {
		double sum = 0;
		for (int score : examScores) {
			sum += score;
		}
		return sum / 4; 
	}
};

bool compareStudents(const Student &a, const Student &b) {
	if (a.surname == b.surname) {
		return a.averageScore() > b.averageScore(); 
	}
	return a.surname < b.surname; 
}

double calculateGroupAverage(const vector<Student> &students) {
	double total = 0;
	for (const auto &student : students) {
		total += student.averageScore();
	}
	return total / students.size();
}
void findStudents(const vector<Student> &students) {
	cout << "Отличники:\n";
	for (const auto &student : students) {
		if (student.averageScore() >= 4.5) {
			cout << student.surname << " " << student.initial << "\n";
		}
	}
	
	cout << "\nХорошисты:\n";
	for (const auto &student : students) {
		if (student.averageScore() >= 3.5 && student.averageScore() < 4.5) {
			cout << student.surname << " " << student.initial << "\n";
		}
	}
	
	cout << "\nСтуденты с оценкой 'удовлетворительно':\n";
	for (const auto &student : students) {
		bool hasSatisfactory = false;
		for (int score : student.examScores) {
			if (score == 3) {               hasSatisfactory = true;
				break;
			}
		}
		if (hasSatisfactory) {
			cout << student.surname << " " << student.initial << "\n";
		}
	}
	
	cout << "\nНе сдавшие сессию:\n";
	for (const auto &student : students) {
		bool failed = false;
		for (int score : student.examScores) {
			if (score < 3) { 
				failed = true;
				break;
			}
		}
		if (failed) {
			cout << student.surname << " " << student.initial << "\n";
		}
	}
}

int main() {
	setlocale(LC_ALL, "");
	vector<Student> students = {
		{"Иванов", 'И', "001", {4, 5, 3, 4}},
		{"Петров", 'П', "002", {2, 3, 4, 3}},
		{"Сидоров", 'С', "003", {5, 5, 5, 4}},
		{"Кузнецов", 'К', "004", {3, 3, 2, 3}},
		{"Смирнов", 'С', "005", {4, 4, 4, 4}}
	};
	
	sort(students.begin(), students.end(), compareStudents);
	
	cout << "Список студентов:\n";
	for (const auto &student : students) {
		cout << student.surname << " " << student.initial 
		<< " - Средний балл: " << fixed << setprecision(2) 
		<< student.averageScore() << "\n";
	}
	
	
	double groupAverage = calculateGroupAverage(students);
	cout << "\nСредний балл группы: " << fixed << setprecision(2) 
	<< groupAverage << "\n";
	
	
	findStudents(students);
	
	return 0;
}