Introduction to Linked List Data Structure Implementation
This presentation focuses on teaching the concept and implementation of linked list data structures using C++ at Virtual University of Pakistan. It covers creating, inserting, and manipulating nodes in a linked list. The importance of node and list classes, along with a main function, is emphasized for effective implementation. Additionally, a practical example of creating a linked list of students is demonstrated.
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Presentation Transcript
Objective of this presentation is to teach you the concept and implementation of list data structure by using linked list Virtual University PAkistan
It is a dynamic data structure. Linked list consist of series of nodes Chain the nodes together to form a linked list Structure of each node is like the one given below Next Next Data Data 1000 1000 Virtual University PAkistan
Insert a node with value 2 in existing list
Picture of our list (2, 6, 8, 7, 1) stored as a linked list: lastcurrentNode lastcurrentNode headNode headNode currentNode currentNode 2 2 6 6 8 8 7 7 1 1 Size = 5 5 Size = 1000 1000 3000 3000 5000 5000 2000 2000 6000 6000 8000 1000 3000 5000 2000 6000 Virtual University PAkistan
We need two classes to implement linked list: 1. Node Class 2. List class In addition to linked list class and node class, we also need a function main() from where execution of our program will start. Virtual University PAkistan
class Student { char* Rollno; Student *NextStudent; public: { Rollno=""; NextStudent=NULL; } class Student Student() Student() // Constructor // Constructor void { Rollno = rno; } void Set_RollNo Set_RollNo(char* rno) (char* rno) //Setter function to set data member //Setter function to set data member Rollno Rollno char* Get_RollNo() { return Rollno; } char* Get_RollNo() //Getter function to get value of //Getter function to get value of Rollno Rollno
void SetNextStudent(Student *NS) //Setter function to set NextStudent { NextStudent = NS; } Student* getNextStudent() //Getter function to get value of NextStudent { return NextStudent; } }; //Setter function to set NextStudent //Getter function to get value of NextStudent
class StudentList { private: Student *HeadStudent,*CurrentStudent; public: class StudentList StudentList::StudentList() StudentList::StudentList() // Constructor // Constructor { HeadStudent = new Student(); HeadStudent->SetNextStudent(NULL); HeadStudent 8000 8000 8000 CurrentStudent CurrentStudent = NULL; } NULL NULL
void Add_Student(char* rno) // Function to add students in list { Student *NewStudent = new Student(); NewStudent->Set_RollNo(rno); NewStudent->SetNextStudent(NULL); if(CurrentStudent == NULL) { HeadStudent = NewStudent; CurrentStudent = NewStudent; } else CurrentStudent->SetNextStudent(NewStudent); CurrentStudent= NewStudent; cout<<CurrentStudent->Get_RollNo(); } // Function to add students in list
main() // Main() function { StudentList S; S.Add_Student("MC000000000."); cout<<endl; S.Add_Student("MC000000001."); cout<<endl; S.Add_Student("MC000000002."); cout<<endl; system("pause"); }
Task 1: Remove the following line from end of Add() function. cout<<CurrentStudent Task 1: cout<<CurrentStudent- ->Get_RollNo(); >Get_RollNo(); Task 2: Add traverse (display) function to display roll number of students. Task 2: Task3: student class and make changes in your code accordingly. Task3: Add more attributes (name, GPA, semester etc) in
