4P0KER · 4P0KER · May 25, 2025
diff --git a/CPP_lab_2.cpp b/CPP_lab_2.cpp
@@ -0,0 +1,164 @@
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <string>
+
+using namespace std;
+
+const double PI = 3.1415926;  // PI и E в ответах означают, 
+const double E = 2.7182818;  // что нет действительных решений
+
+
+vector<double> SolveQuadraticEquation(double a, double b, double c) {
+    double D = b * b - 4 * a * c;
+    vector<double> roots;
+
+    if (D >= 0.0) {
+        double x1 = (-b + sqrt(D)) / (2 * a);
+        double x2 = (-b - sqrt(D)) / (2 * a);
+        roots.push_back(x1);
+        roots.push_back(x2);
+    }
+    else {
+        roots.push_back(PI);
+        roots.push_back(E);
+    }
+
+    return roots;
+}
+
+
+class Student {
+public:
+    string surname;
+    vector<vector<double>> answers;
+
+    Student(string surname) : surname(surname) {}
+
+    virtual void Solve(vector<vector<double>> tasks) = 0;
+};
+
+
+class GoodStudent : public Student {
+public:
+    GoodStudent(string surname) : Student(surname) {}
+
+    void Solve(vector<vector<double>> tasks) override {
+        for (const vector<double>& task : tasks) {
+            answers.push_back(SolveQuadraticEquation(task[0], task[1], task[2]));
+        }
+    }
+};
+
+
+class BadStudent : public Student {
+public:
+    BadStudent(string surname) : Student(surname) {}
+
+    void Solve(vector<vector<double>> tasks) override {
+        for (const vector<double>& task : tasks) {
+            answers.push_back({ 0, 0 });
+        }
+    }
+};
+
+
+class MiddleStudent : public Student {
+public:
+    MiddleStudent(string surname) : Student(surname) {}
+
+    void Solve(vector<vector<double>> tasks) override {
+        for (const vector<double>& task : tasks) {
+            if (rand() % 2 == 0) {
+                answers.push_back(SolveQuadraticEquation(task[0], task[1], task[2]));
+            }
+            else {
+                answers.push_back({ 0, 0 });
+            }
+        }
+    }
+};
+
+
+class Teacher {
+protected:
+    vector<vector<double>> right_answers;
+
+public:
+    void GetRightAnswers(const vector<vector<double>>& tasks) {
+        for (const vector<double>& task : tasks) {
+            right_answers.push_back(SolveQuadraticEquation(task[0], task[1], task[2]));
+        }
+    }
+
+    int Check(const Student* student) {
+        int scores = 0;
+        for (size_t i = 0; i < right_answers.size(); i++) {
+            if (right_answers[i] == student->answers[i]) {
+                scores++;
+            }
+        }
+        return scores;
+    }
+
+    void PrintProgressTable(const vector<Student*>& students) {
+        for (int i = 0; i < students.size(); i++) {
+            cout << students[i]->surname << "  " << Check(students[i]) << "  " << right_answers.size() << endl;
+        }
+    }
+
+};
+
+
+void input() {
+    setlocale(LC_ALL, "Russian");
+    srand(time(NULL));
+
+    ifstream fin_surnames("surnames.txt");
+    vector<string> surnames;
+    if (fin_surnames) {
+        string surname;
+        while (getline(fin_surnames, surname)) {
+            surnames.push_back(surname);
+        }
+        fin_surnames.close();
+    }
+
+    ifstream fin_tasks("tasks.txt");
+    vector<vector<double>> tasks;
+    if (fin_tasks) {
+        double a, b, c;
+        while (fin_tasks >> a >> b >> c) {
+            tasks.push_back({ a, b, c });
+        }
+        fin_tasks.close();
+    }
+
+    vector<Student*> students;
+    for (const string& surname : surnames) {
+        Student* student = nullptr;
+
+        int intellect = rand() % 3;
+        switch (intellect) {
+        case 0:
+            student = new GoodStudent(surname);
+            break;
+        case 1:
+            student = new BadStudent(surname);
+            break;
+        case 2:
+            student = new MiddleStudent(surname);
+            break;
+        }
+        student->Solve(tasks);
+        students.push_back(student);
+    }
+
+    Teacher teacher = Teacher();
+    teacher.GetRightAnswers(tasks);
+    teacher.PrintProgressTable(students);
+}
+
+void main() {
+    input();
+}
diff --git a/CPP_lab_2.sln b/CPP_lab_2.sln
@@ -0,0 +1,31 @@
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@@ -0,0 +1,135 @@
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