Lab2

Author: danyathecoder

2-5.docx

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+#include <cmath>
+#include <iostream>
+
+using namespace std;
+
+int main(){
+    double a, b, c;
+    cin >> a >> b >> c;
+    cout.precision(2);
+    if(a < 0){
+        a = (-1)*a;
+        b = (-1)*b;
+        c = (-1)*c;
+    }
+    if(a == 0 && b == 0)
+        return 0;
+    if(a == 0){
+        cout << (-1.0)*c/b;
+        return 0;
+}
+    int D = b*b - 4*a*c;
+    if(D < 0)
+        return 0;
+    if(D == 0) 
+        cout << ((-1)*b)/(2*a);
+    if(D > 0)
+        cout << ((-1)*b + sqrt(D)) / (2*a)<<" "<< ((-1)*b - sqrt(D)) / (2*a);
+    return 0;
+}

Lab1.cpp

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+cmake_minimum_required(VERSION 3.17)
+project(Lab2)
+
+set(CMAKE_CXX_STANDARD 17)
+
+add_executable(Lab2 main.cpp Schoolkid.cpp Schoolkid.h Teacher.cpp Teacher.h)

Lab2/.idea/.gitignore

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+//
+// Created by danilapoddubny on 11/09/2020.
+//
+
+#include "Schoolkid.h"
+#include <iostream>
+#include <iomanip>
+
+Schoolkid::Schoolkid(const string &new_name, const int &new_id, const int &new_missed) {
+    id = new_id;
+    missed = new_missed;
+    name = new_name;
+}
+
+Schoolkid::Schoolkid() {
+    id = 42;
+    missed = 0;
+    name = "John Doe";
+}
+
+Schoolkid::~Schoolkid() {
+    cout << "Goodbye, " << name << "."<< endl;
+}
+
+void Schoolkid::changeName(const string &new_name) {
+    name = new_name;
+}
+
+void Schoolkid::changeID(const int &n) {
+    id = n;
+}
+
+void printData(const Schoolkid& obj){
+    cout << obj.name;
+    cout << setw(53) << obj.id;
+    cout << setw(40) << obj.missed << endl;
+}

Lab2/.idea/Lab2.iml

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+//
+// Created by danilapoddubny on 11/09/2020.
+//
+
+#ifndef LAB2_SCHOOLKID_H
+#define LAB2_SCHOOLKID_H
+
+#include <string>
+using namespace std;
+
+class Schoolkid {
+private:
+    int id;
+    int missed;
+    string name;
+public:
+    Schoolkid(const string& new_name, const int& new_id, const int& new_missed);
+    Schoolkid();
+    ~Schoolkid();
+    friend void printData(const Schoolkid& obj);
+    friend class Teacher;
+    void changeName(const string& new_name);
+    void changeID(const int& n);
+};
+
+void printData(const Schoolkid& obj);
+
+
+#endif //LAB2_SCHOOLKID_H

Lab2/.idea/misc.xml

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+//
+// Created by danilapoddubny on 11/09/2020.
+//
+
+#include "Teacher.h"
+#include <iostream>
+
+Teacher::Teacher() {
+    name = "Maria Ivanovna";
+    salary = "too low";
+}
+
+void Teacher::setMissings(Schoolkid &obj, const int missings) {
+    obj.missed = missings;
+}
+
+void sayHelloToMyLittleFriend(const Teacher& obj){
+    cout << "https://www.youtube.com/watch?v=AVQ8byG2mY8&ab_channel=Godlike"<< endl <<
+         "Hi, children. My name is " << obj.name <<
+         "And my salary is " << obj.salary << " to listen you." << endl;
+}

Lab2/.idea/modules.xml

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+//
+// Created by danilapoddubny on 11/09/2020.
+//
+
+#ifndef LAB2_TEACHER_H
+#define LAB2_TEACHER_H
+
+#include "Schoolkid.h"
+#include <string>
+using namespace std;
+
+
+class Teacher {
+private:
+    string name;
+    string salary;
+public:
+    Teacher();
+    void setMissings(Schoolkid& obj, const int missings);
+    friend void sayHelloToMyLittleFriend(const Teacher& obj);
+};
+
+void sayHelloToMyLittleFriend(const Teacher& obj);
+
+
+#endif //LAB2_TEACHER_H