Add files via upload

Class_Publication.cpp

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+#include <iostream>
+using namespace std;
+
+class publication {
+public:
+    string title;
+    float prize;
+
+    void getdata() {
+        cout << "Enter Name of Publication: ";
+        cin >> title;
+        cout << "Enter Price of Publication: ";
+        cin >> prize;
+        cout << endl;
+    }
+
+    void putdata() {
+        cout << "Publication Title: " << title << endl;
+        cout << "Publication Price: " << prize << endl;
+    }
+};
+
+class book : public publication {
+public:
+    int pagecount;
+
+    void getdata() {
+        publication::getdata();
+        cout << "Enter Book Page Count: ";
+        cin >> pagecount;
+        cout << endl;
+    }
+
+    void putdata() {
+        publication::putdata();
+        cout << "Book Page Count: " << pagecount << endl;
+        cout << endl;
+    }
+};
+
+class tape : public publication {
+private:
+    float ptime;
+
+public:
+    void getdata() {
+        publication::getdata();
+        cout << "Enter Tape Playing Time (Minutes): ";
+        cin >> ptime;
+        cout << endl;
+    }
+
+    void putdata() {
+        publication::putdata();
+        cout << "Tape Playing Time: " << ptime << " min" << endl;
+        cout << endl;
+    }
+};
+
+int main() {
+    book b;
+    tape t;
+
+    b.getdata();
+    t.getdata();
+    b.putdata();
+    t.putdata();
+
+    return 0;
+}

Complex.cpp

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+#include <iostream>
+using namespace std;
+
+class complex {
+    float realp, imagp;
+
+public:
+    complex() {
+        realp = 0;
+        imagp = 0;
+    }
+
+    complex(float x, float y) {
+        realp = x;
+        imagp = y;
+    }
+
+    complex operator+(complex &);
+    complex operator*(complex &);
+
+    friend istream &operator>>(istream &, complex &);
+    friend ostream &operator<<(ostream &, const complex &);
+};
+
+istream &operator>>(istream &din, complex &c) {
+    cout << "Enter real part of complex number: ";
+    din >> c.realp;
+    cout << "Enter imaginary part of complex number: ";
+    din >> c.imagp;
+    return din;
+}
+
+ostream &operator<<(ostream &dout, const complex &c) {
+    dout << c.realp << " + " << c.imagp << "i";
+    return dout;
+}
+
+complex complex::operator+(complex &c) {
+    complex temp;
+    temp.realp = realp + c.realp;
+    temp.imagp = imagp + c.imagp;
+    return temp;
+}
+
+complex complex::operator*(complex &c) {
+    complex mul;
+    mul.realp = (realp * c.realp) - (imagp * c.imagp);
+    mul.imagp = (imagp * c.realp) + (realp * c.imagp);
+    return mul;
+}
+
+int main() {
+    complex c1, c2, c3;
+
+    cout << "Enter complex number 1" << endl;
+    cin >> c1;
+
+    cout << "Enter complex number 2" << endl;
+    cin >> c2;
+
+    c3 = c1 + c2;
+    cout << "Addition of two complex numbers is: " << c3 << endl;
+
+    c3 = c1 * c2;
+    cout << "Multiplication of two complex numbers is: " << c3 << endl;
+
+    return 0;
+}

Constructor.cpp

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+#include <iostream>
+#include <cstring>
+#include <iomanip>
+using namespace std;
+
+class db {
+    int roll;
+    char name[20];
+    char Class[10];
+    char Div[10];
+    char dob[10];
+    char bg[3], contact[10];
+    char phone[10], license[12];
+
+public:
+    static int stdno;
+
+    static void count() {
+        cout << "No. of objects created: " << stdno << endl;
+    }
+
+    void fin() { cout << "Inline Function!" << endl; }
+
+    db() {
+        roll = 0;
+        strcpy(name, "Sachin");
+        strcpy(Class, "I");
+        strcpy(Div, "A");
+        strcpy(dob, "11/11/1111");
+        strcpy(bg, "A");
+        strcpy(contact, "city");
+        strcpy(phone, "9000000000");
+        strcpy(license, "A0101010");
+        ++stdno;
+    }
+
+    db(db* ob) {
+        strcpy(name, ob->name);
+        strcpy(dob, ob->dob);
+        strcpy(Class, ob->Class);
+        strcpy(Div, ob->Div);
+        strcpy(bg, ob->bg);
+        strcpy(contact, ob->contact);
+        strcpy(phone, ob->phone);
+        strcpy(license, ob->license);
+        ++stdno;
+    }
+
+    void getdata() {
+        cout << "Enter Name Of Student: ";
+        cin >> name;
+        cout << "Enter Roll Number: ";
+        cin >> roll;
+        cout << "Enter Class: ";
+        cin >> Class;
+        cout << "Enter Division: ";
+        cin >> Div;
+        cout << "Enter Date Of Birth: ";
+        cin >> dob;
+        cout << "Enter Blood Group: ";
+        cin >> bg;
+        cout << "Enter Address: ";
+        cin >> contact;
+        cout << "Enter Contact Number: ";
+        cin >> phone;
+        cout << "Enter License No.: ";
+        cin >> license;
+    }
+
+    friend void display(const db& d);
+
+    ~db() {
+        cout << this->name << "(Object) is destroyed!" << endl;
+    }
+};
+
+void display(const db& d) {
+    cout << setw(12) << "Index" << setw(12) << "Name" << setw(12) << "Roll" 
+         << setw(10) << "Class" << setw(8) << "Div" << setw(12) << "DOB" 
+         << setw(5) << "Blood Group" << setw(12) << "Contact" << setw(12) << "Phone" 
+         << setw(12) << "License" << endl;
+
+    cout << setw(12) << 0 << setw(12) << d.name << setw(12) << d.roll 
+         << setw(10) << d.Class << setw(8) << d.Div << setw(12) << d.dob
+         << setw(5) << d.bg << setw(12) << d.contact << setw(12) << d.phone 
+         << setw(12) << d.license << endl;
+}
+
+
+
+int db::stdno = 0;
+
+int main() {
+    db defaultObj;
+    cout << "Default values of the object: ";
+    cout<<endl;
+    display(defaultObj);
+
+    int n, i, delIndex;
+    cout << "How many objects do you want to create?: ";
+    cin >> n;
+    db** ptr = new db*[n];
+    for (i = 0; i < n; i++) {
+        ptr[i] = new db();
+        ptr[i]->getdata();
+    }
+    cout << setw(12) << "Index" << setw(12) << "Name" << setw(5) << "Roll" << setw(4) << "Class" << setw(4) << "Div" << setw(12) <<
+        "DOB" << setw(4) << "Blood Group" << setw(12) << "Contact" << setw(12) << "Phone" << setw(12) << "License" << endl;
+    for (i = 0; i < n; i++) {
+        cout << setw(12) << i;
+        display(*ptr[i]);
+    }
+    db::count();
+
+    char choice;
+    do {
+        cout << "**Menu**";
+        cout << "1. Add new object";
+        cout << "2. Delete an object";
+        cout << "3. Exit";
+        cout << "Enter your choice: ";
+        cin >> choice;
+        switch (choice) {
+            case '1': {
+                db** newPtr = new db*[n + 1];
+                for (i = 0; i < n; i++) {
+                    newPtr[i] = ptr[i];
+                }
+                newPtr[n] = new db();
+                newPtr[n]->getdata();
+                ptr = newPtr;
+                n++;
+                cout << setw(12) << "Index" << setw(12) << "Name" << setw(5) << "Roll" << setw(4) << "Class" << setw(4) << "Div" << setw(12) <<
+                    "DOB" << setw(4) << "Blood Group" << setw(12) << "Contact" << setw(12) << "Phone" << setw(12) << "license" << endl;
+                for (i = 0; i < n; i++) {
+                    cout << setw(12) << i;
+                    display(*ptr[i]);
+                }
+                db::count();
+                break;
+            }
+            case '2': {
+                cout << "Enter the index of the object you want to delete (0 to " << n - 1 << "): ";
+                cin >> delIndex;
+                if (delIndex >= 0 && delIndex < n) {
+                    delete ptr[delIndex];
+                    ptr[delIndex] = NULL;
+                    cout << "Object at index " << delIndex << " deleted!" << endl;
+                } else {
+                    cout << "Invalid index!" << endl;
+                }
+
+                cout << "Remaining objects:" << endl;
+                for (i = 0; i < n; i++) {
+                    if (ptr[i] != NULL) {
+                        cout << setw(12) << i;
+                        display(*ptr[i]);
+                    }
+                }
+                break;
+            }
+            case '3': {
+                cout << "Exiting program." << endl;
+                break;
+            }
+            default:
+                cout << "Invalid choice!" << endl;
+                break;
+        }
+    } while (choice != '3');
+
+    for (i = 0; i < n; i++) {
+        if (ptr[i] != NULL) {
+            delete ptr[i];
+        }
+    }
+    delete[] ptr;
+    return 0;
+}

Employee_File.cpp

@@ -0,0 +1,57 @@
+#include<iostream>
+#include<fstream>
+using namespace std;
+
+class employee {
+    char name[20];
+    int ID;
+    double salary;
+
+public:
+    void accept() {
+        cout << "Enter name: ";
+        cin >> name;
+        cout << "Enter ID: ";
+        cin >> ID;
+        cout << "Enter salary: ";
+        cin >> salary;
+        cout<<endl;
+    }
+
+    void display() {
+        cout << "Name: " << name <<endl;
+        cout << "ID: " << ID <<endl;
+        cout << "Salary: " << salary << endl;
+        cout<<endl;
+    }
+};
+
+int main() {
+    employee o[5];
+    fstream f;
+    int i, n;
+
+    cout << "How many employee information do you need to store? ";
+    cin >> n;
+
+    f.open("employee.txt", ios::out | ios::binary);
+
+    cout << "Enter information of Employees:" << endl;
+    for(i = 0; i < n; i++) {
+        cout << "Enter information of Employee " << (i + 1) << ":" << endl;
+        o[i].accept();
+        f.write((char*)&o[i], sizeof(o[i]));
+    }
+    f.close();
+
+    f.open("employee.txt", ios::in | ios::binary);
+
+    cout << "Information of employees is as follows:" << endl;
+    for(i = 0; i < n; i++) {
+        f.read((char*)&o[i], sizeof(o[i]));
+        o[i].display();
+    }
+    f.close();
+
+    return 0;
+}