diff --git a/.gitignore/.gitignore b/.gitignore
similarity index 62%
rename from .gitignore/.gitignore
rename to .gitignore
index 9fb6852..e926b21 100644
--- a/.gitignore/.gitignore
+++ b/.gitignore
@@ -1,2 +1,2 @@
 .exe
-.o
+.o
\ No newline at end of file
diff --git a/Exercise_8/8.1_bank_account/main.cpp b/Exercise_8/8.1_bank_account/main.cpp
new file mode 100644
index 0000000..b9ff9c5
--- /dev/null
+++ b/Exercise_8/8.1_bank_account/main.cpp
@@ -0,0 +1,129 @@
+#include <iostream>
+#include<cmath>
+#include<STDLIB.H>
+using namespace std;
+
+/*
+    QUESTION
+*/
+
+class Account
+{
+    string name ;
+    string acc_type ;
+    int acc_no ;
+
+    public:
+    int bal ;
+
+    void get_cust_info()
+    {
+            cout <<"Enter your name :" << endl;
+            cin >>name;
+            cout <<"Enter account no :" ;
+            cin >>acc_no;
+            cout <<"\n Enter account type :" ;
+            cin >>acc_type;
+            cout<<"\n Enter balance :";
+            cin >>bal;
+            }
+};
+
+class curr_acc : public Account
+{
+    int amount;
+    int min_bal ;
+
+    void initialize_min_bal()
+    {
+        min_bal = 500;
+    }
+    void get()
+    {
+         cout << "";
+        cout <<"Enter amount that you want to pass in cheque" << endl;
+        cin >> amount;
+
+        if(bal <= min_bal)
+        {
+            cout <<"Penalty will be charged of rs.100  because of insufficient balance !" <<endl;
+            cout<<"Your minimum balance should be rs.500" <<endl;
+            bal -= 100;
+        }
+    }
+
+     void disp_bal()
+    {
+            bal+=amount;
+            cout<<"Your updated balance is :" <<endl;
+    }
+
+
+};
+
+class sav_acc : public Account
+{
+        int prin_amount;
+        int int_rate;
+        int time;
+        int n;
+        int interest;
+
+        public:
+        void get_data()
+        {
+                cout<<"\nEnter  the principal investment amount  :"<<endl;
+                cin>>prin_amount;
+                cout <<"\nEnter the annual interest rate (decimal)"<<endl;
+                cin>>int_rate;
+                cout <<"\nEnter the number of years the money is invested or borrowed for :" <<endl;
+                cin>>time;
+                 cout <<"\nEnter the number of times that interest is compounded per year :" <<endl;
+                 cin>>n;
+        }
+
+        void calculate_interest()
+        {
+            interest = pow((1 +(int_rate/n)) , (n*time));
+            cout<<"\n Interest is :" << interest;
+            cout<<"The total balance is :" << interest+bal;
+        }
+
+};
+
+int main()
+{
+    Account acc ;
+    sav_acc sav;
+    curr_acc cur;
+    int depo , no;
+
+    cout<<"Enter details :"<<endl;
+
+    cout <<"\nWhich task do you want to perform ?" <<endl ;
+    cout<<"\n1.Deposit the balance \n2. Display the current balnce \n3. Compute and deposit interest";
+    cout<<" \n4.exit"<<endl;
+
+    switch(no)
+    {
+        case 1 :
+             cout<<"\n Enter deposit :" ;
+            cin >> depo;
+            acc.bal += depo;
+
+    case 2:
+            cout<< "Your current balance is :" << acc.bal;
+
+    case 3:
+            //cout<< "Computed interest is :" << sav.calculate_interest();
+            cout<< "Computed interest is :"<<sav.calculate_interest();
+
+    case 4:
+            exit(0);
+
+    defualt :
+            cout<<"Enter valid choice :" << endl;
+    };
+
+    return 0;
+}
diff --git a/Exercise_8/8.3_modified_account_class/main.cpp b/Exercise_8/8.3_modified_account_class/main.cpp
new file mode 100644
index 0000000..c1f72d7
--- /dev/null
+++ b/Exercise_8/8.3_modified_account_class/main.cpp
@@ -0,0 +1,111 @@
+#include <iostream>
+#include<cstring>
+
+using namespace std;
+
+class Staff
+{
+    int code ;
+    string name ;
+
+    public:
+    void get_staff_info()
+    {
+        cout <<"\nEnter your code and name :" <<endl;
+        cin >> code >> name;
+        cout << "Code :" << code << "\tName :" << name<<endl;
+    }
+};
+
+class Teacher :  public Staff
+{
+    string subject ;
+    string publication ;
+
+    public:
+    void teacher_info()
+    {
+        cout <<"\nEnter your subject and publication :"<<endl;
+        cin >> subject >> publication ;
+        cout <<"Subject :" << subject << "\tPublication :" << publication <<endl;
+    }
+};
+
+class Typist : public Staff
+{
+    int speed ;
+
+    public:
+    void get_speed()
+    {
+            cout <<"\nEnter your speed :";
+            cin>>speed;
+            cout <<"Your speed is :" <<speed<<endl;
+    }
+};
+
+class Officer : public Staff
+{
+    public:
+    string grade;
+    //take grade from user in main
+
+    void get_off_info()
+    {
+            cout<<"\nYou are " << grade << " grade officer" <<endl;
+    }
+};
+
+class Regular : public Typist
+{
+  //  string type;
+    public:
+    Regular()
+   {
+        cout <<"\nYou are regular typist." <<endl;
+    }
+};
+
+class Casual : public Typist
+{
+    int daily_wages ;
+    //take daily_wages from user in main
+    public:
+    void casual_typist_info()
+    {
+        cout<<"Enter your daily wages :"<<endl;
+        cin>>daily_wages;
+        cout <<"\nYou are casual typist and your daily wages are :" << daily_wages<<endl;
+    }
+};
+int main()
+{
+    Staff stf;
+    Teacher tch;
+    Typist typ;
+    Casual cas;
+
+    cout<<"Enter details as required :" << endl;
+
+    stf.get_staff_info();
+
+    tch.teacher_info();
+
+    typ.get_speed();
+
+    cout<<"\nEnter which type of officer you are :"<<endl;
+    Officer off;
+    cin >>off.grade;
+    off.get_off_info();
+
+    cout<<"\nEnter which type of typist you are ?"<<endl;
+    char ch;
+    cout<<"\n r. Regular Typist \n c. Casual Typist"<<endl;
+    cin>>ch;
+   if(ch == 'r')
+        Regular reg;
+    else if(ch == 'c')
+        cas.casual_typist_info();
+
+    return 0;
+}
diff --git a/Exercise_8/8.4_edu_class/main.cpp b/Exercise_8/8.4_edu_class/main.cpp
new file mode 100644
index 0000000..974b65d
--- /dev/null
+++ b/Exercise_8/8.4_edu_class/main.cpp
@@ -0,0 +1,134 @@
+#include <iostream>
+#include<cstring>
+
+using namespace std;
+
+class Staff
+{
+    int code ;
+    string name ;
+
+    public:
+    void get_staff_info()
+    {
+        cout <<"\nEnter your code and name :" <<endl;
+        cin >> code >> name;
+        cout << "Code :" << code << "\tName :" << name<<endl;
+    }
+};
+
+class Teacher :  public Staff
+{
+    string subject ;
+    string publication ;
+
+    public:
+    void teacher_info()
+    {
+        cout <<"\nEnter your subject and publication :"<<endl;
+        cin >> subject >> publication ;
+        cout <<"Subject :" << subject << "\tPublication :" << publication <<endl;
+    }
+};
+
+class Typist : public Staff
+{
+    int speed ;
+
+    public:
+    void get_speed()
+    {
+            cout <<"\nEnter your speed :";
+            cin>>speed;
+            cout <<"Your speed is :" <<speed<<endl;
+    }
+};
+
+class Officer : public Staff
+{
+    public:
+    string grade;
+    //take grade from user in main
+
+    void get_off_info()
+    {
+            cout<<"\nYou are " << grade << " grade officer" <<endl;
+    }
+};
+
+class Regular : public Typist
+{
+  //  string type;
+    public:
+    Regular()
+   {
+        cout <<"\nYou are regular typist." <<endl;
+    }
+};
+
+class Casual : public Typist
+{
+    int daily_wages ;
+    //take daily_wages from user in main
+    public:
+    void casual_typist_info()
+    {
+        cout<<"Enter your daily wages :"<<endl;
+        cin>>daily_wages;
+        cout <<"\nYou are casual typist and your daily wages are :" << daily_wages<<endl;
+    }
+};
+
+class Education :Teacher ,  Officer
+{
+    string gen_edu;
+    string prof_edu;
+    char chr;
+
+    public:
+    void get_info_edu()
+    {
+        cout<<"\nEnter your designation :" <<endl;
+        cout<<"\n g. General Education \np. Proffessional Education"<<endl;
+        cin>>chr;
+
+        if(chr == 'g')
+            cout << "You have general education.";
+        else if(chr == 'p')
+            cout<<"You have proffesional education.";
+    }
+};
+int main()
+{
+    Staff stf;
+    Teacher tch;
+    Typist typ;
+    Casual cas;
+    Education edu;
+
+    cout<<"Enter details as required :" << endl;
+
+    stf.get_staff_info();
+
+    tch.teacher_info();
+
+    typ.get_speed();
+
+    cout<<"\nEnter which type of officer you are :"<<endl;
+    Officer off;
+    cin >>off.grade;
+    off.get_off_info();
+
+    cout<<"\nEnter which type of typist you are ?"<<endl;
+    char ch;
+    cout<<"\n r. Regular Typist \n c. Casual Typist"<<endl;
+    cin>>ch;
+   if(ch == 'r')
+        Regular reg;
+    else if(ch == 'c')
+        cas.casual_typist_info();
+
+    edu.get_info_edu();
+
+    return 0;
+}
diff --git a/Exercise_8/8.5_modified_edu_class/main.cpp b/Exercise_8/8.5_modified_edu_class/main.cpp
new file mode 100644
index 0000000..a9f4dcd
--- /dev/null
+++ b/Exercise_8/8.5_modified_edu_class/main.cpp
@@ -0,0 +1,60 @@
+/* Exercise_8_8.5*/
+#include <iostream>
+#include<cstring>
+
+using namespace std;
+
+class Person
+{
+    public:     //as data memebers are protected , it can be used by their subclasses
+    int personCode ;
+    string PersonName;
+};
+
+class Account : Person
+{
+    protected:      //as data memebers are protected , it can be used by their subclasses
+    int pay;
+};
+
+class Admin : Person
+{
+    protected :     //as data memebers are protected , it can be used by their subclasses
+    int exp;
+};
+
+class Master : Account , Admin
+{
+    public:
+
+    void disp_person_info()     //displays person's information
+    {
+        cout <<"Enter name and code :"<<endl;
+        cin >> personCode>> personName;
+        cout<<"Code:"<<personCode<<"\tName:"<<PersonName<<endl;
+    }
+
+    void get_amount()    //it will take amount and display it
+    {
+        cout <<"How much amount is paid to you ?"<<endl;
+        cin >>pay;
+        cout<<"Your paid amount is :" << pay<<endl;
+    }
+
+    void disp_exp()     //displays experience
+    {
+        cout<<"How many years of experience do you have ?" <<endl;
+        cin>> exp;
+        cout<<"You have " << exp << "year expereince" << endl;
+    }
+};
+int main()
+{
+    Master mas;
+
+   mas.disp_person_info();
+   mas.disp_exp();
+   mas.get_amount();
+
+    return 0;
+}
diff --git a/Exercise_8/8.6_use_container_class/8.6_use_container_class.cpp b/Exercise_8/8.6_use_container_class/8.6_use_container_class.cpp
new file mode 100644
index 0000000..6863d4a
--- /dev/null
+++ b/Exercise_8/8.6_use_container_class/8.6_use_container_class.cpp
@@ -0,0 +1,134 @@
+/*using container class re-writing exercise 8.3*/
+#include <iostream>
+#include<cstring>
+
+using namespace std;
+
+class Staff
+{
+    int code ;
+    string name ;
+
+    public:
+    void get_staff_info()
+    {
+        cout <<"\nEnter your code and name :" <<endl;
+        cin >> code >> name;
+        cout << "Code :" << code << "\tName :" << name<<endl;
+    }
+};
+
+class Teacher
+{
+    string subject ;
+    string publication ;
+    Staff stf1;
+
+    public:
+
+    void teacher_info()
+    {
+        cout<<"\n***In teacher class ***"<<endl;
+        stf1.get_staff_info();
+        cout <<"\nEnter your subject and publication :"<<endl;
+        cin >> subject >> publication ;
+        cout <<"Subject :" << subject << "\tPublication :" << publication <<endl;
+    }
+};
+
+class Typist
+{
+    int speed ;
+    Staff stf2;
+
+    public:
+
+    void get_speed()
+    {
+            cout<<"\n***In typist class ***"<<endl;
+            stf2.get_staff_info();
+            cout <<"\nEnter your speed :";
+            cin>>speed;
+            cout <<"Your speed is :" <<speed<<endl;
+    }
+};
+
+class Officer
+{
+    public:
+    char grade;
+    //take grade from user in main
+    Staff stf3;
+
+    void get_off_info()
+    {
+
+            cout<<"\n***In officer class ***"<<endl;
+            stf3.get_staff_info();
+            cout<<"\nEnter which type of officer you are :"<<endl;
+            cin >>grade;
+            cout<<"\nYou are " << grade << " grade officer" <<endl;
+    }
+};
+
+class Regular : public Typist
+{
+  //  string type;
+    public:
+    Regular()
+   {
+        cout <<"\nYou are regular typist." <<endl;
+    }
+};
+
+class Casual : public Typist
+{
+    int daily_wages ;
+    //take daily_wages from user in main
+    public:
+    void casual_typist_info()
+    {
+        cout<<"Enter your daily wages :"<<endl;
+        cin>>daily_wages;
+        cout <<"\nYou are casual typist and your daily wages are :" << daily_wages<<endl;
+    }
+};
+int main()
+{
+    Officer off;
+    Teacher tch;
+    Typist typ;
+    Casual cas;
+
+    cout<<"Enter details as required :" << endl;
+
+    tch.teacher_info();
+
+    off.get_off_info();
+
+    typ.get_speed();
+    cout<<"\nEnter which type of typist you are ?"<<endl;
+    char ch;
+    cout<<"\nr. Regular Typist \nc. Casual Typist"<<endl;
+    cin>>ch;
+   if(ch == 'r' || 'R')
+        Regular reg;
+    else if(ch == 'c' || 'C')
+        cas.casual_typist_info();
+
+
+    //cout<<"\nEnter which type of officer you are :"<<endl;
+   // cin >>off.grade;
+
+
+    /*cout<<"\nEnter which type of typist you are ?"<<endl;
+    char ch;
+    cout<<"\n r. Regular Typist \n c. Casual Typist"<<endl;
+    cin>>ch;
+   if(ch == 'r')
+        Regular reg;
+    else if(ch == 'c')
+        cas.casual_typist_info();
+*/
+    return 0;
+}