Let us see the tutorial of “Insertion of a node at the end (rightmost position) of the Singly Link List.
Demonstration
C++ Source code for Insertion of a node at the end of Singly Link List
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#include<iostream> #include <stdlib.h> using namespace std; struct node { int number; //Data of the node struct node *nextptr; //Address of the node } *starting; void createNodeList(int n); //function to create the list void InsertRighttEnd(int number); //function to insert node at the end void displayList(); //function to display the list int main() { int n,number; cout<<"\n\n\n Linked List : Insert a new node at the end of a Singly Linked List :\n"; cout<<" Please input the the number of nodes : "; cin>>n; createNodeList(n); cout<<"\n Data entered by the user in the list is: \n"; displayList(); cout<<"\n Please input the data to insert at the end of the list : "; cin>>number; InsertRighttEnd(number); cout<<"\n Data, after inserted in the list are : \n"; displayList(); return 0; } void createNodeList(int n) { struct node *final, *tmp; int number, i; starting = (struct node *)malloc(sizeof(struct node)); if(starting == NULL) //check whether the starting is NULL and if so no memory allocation { cout<<" Memory can not be allocated."; } else { // reads data for the node through keyboard cout<<" Please input the data for node 1 : "; cin>>number; starting-> number = number; starting-> nextptr = NULL; //Links the address field to NULL tmp = starting; //Creates n nodes and adds to linked list for(i=2; i<=n; i++) { final = (struct node *)malloc(sizeof(struct node)); if(final == NULL) //check whether the final is NULL and if so no memory allocation { cout<<" Memory can not be allocated."; break; } else { cout<<" Please input the data for node 2 : "; cin>>number; final->number = number; // links the number field of final with number final->nextptr = NULL; // links the address field of final with NULL tmp->nextptr = final; // links previous node i.e. tmp to the final tmp = tmp->nextptr; } } } } void InsertRighttEnd(int number) { struct node *final, *tmp; final = (struct node*)malloc(sizeof(struct node)); if(final == NULL) { cout<<" Memory can not be allocated."; } else { final->number = number; //Links the data part final->nextptr = NULL; tmp = starting; while(tmp->nextptr != NULL) { tmp = tmp->nextptr; } tmp->nextptr = final; //Links the address part } } void displayList() { struct node *tmp; if(starting == NULL) { cout<<" No data found in the empty list."; } else { tmp = starting; while(tmp != NULL) { cout<<tmp->number<<","; // prints the data of current node tmp = tmp->nextptr; // advances the position of current node } } } |
Output
Insert a node at second last position in a singly link list
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#include<iostream> #include <stdlib.h> using namespace std; struct node { int number; //Data of the node struct node *nextptr; //Address of the node } *starting; void createNodeList(int n); //function to create a singly link list void InsertSecondlastEnd(int number); //function to insert node at the second last position at the end void displayList(); //function to display a singly link list int main() { int n,number; cout<<"\n\n\n Linked List : Insert a new node at the second last position at the end of a Singly Linked List :\n"; cout<<" Please input the the number of nodes : "; cin>>n; createNodeList(n); cout<<"\n Data entered by the user in the list is: \n"; displayList(); cout<<"\n Please input the data to insert at the second last position of the link list : "; cin>>number; InsertSecondlastEnd(number); cout<<"\n Data, after inserted in the link list is: \n"; displayList(); return 0; } void createNodeList(int n) { struct node *final, *tmp; int number, i; starting = (struct node *)malloc(sizeof(struct node)); if(starting == NULL) //check whether the starting is NULL and if so no memory allocation { cout<<" Memory can not be allocated."; } else { // reads data for the node through keyboard cout<<" Please input the data for node 1 : "; cin>>number; starting-> number = number; starting-> nextptr = NULL; //Links the address field to NULL tmp = starting; //Creates n nodes and adds to linked list for(i=2; i<=n; i++) { final = (struct node *)malloc(sizeof(struct node)); if(final == NULL) //check whether the final is NULL and if so no memory allocation { cout<<" Memory can not be allocated."; break; } else { cout<<" Please input the data for node "<<i<<" : "; cin>>number; final->number = number; // links the number field of final with number final->nextptr = NULL; // links the address field of final with NULL tmp->nextptr = final; // links previous node i.e. tmp to the final tmp = tmp->nextptr; } } } } void InsertSecondlastEnd(int number) { struct node *final, *tmp, *secondlast; final = (struct node*)malloc(sizeof(struct node)); if(final == NULL) { cout<<" Memory can not be allocated."; } else { final->number = number; //Links the data part final->nextptr = NULL; tmp = starting; while(tmp->nextptr != NULL) {secondlast=tmp; tmp = tmp->nextptr; } secondlast->nextptr = final; //Links the address part final->nextptr=tmp; } } void displayList() { struct node *tmp; if(starting == NULL) { cout<<" No data found in the empty list."; } else { tmp = starting; while(tmp != NULL) { cout<<tmp->number<<","; // prints the data of current node tmp = tmp->nextptr; // advances the position of current node } } } |
Output
Linked List : Insert a new node at the end of a Singly Linked List :
Please input the the number of nodes : 6
Please input the data for node 1 : 44
Please input the data for node 2 : 55
Please input the data for node 3 : 66
Please input the data for node 4 : 77
Please input the data for node 5 : 88
Please input the data for node 6 : 99
Data entered by the user in the list is:
44, 55, 66, 77, 88, 99
Please input the data to insert at the second last position of the link list :
11
Data, after inserted in the link list is:
44, 55, 66, 77, 88, 11, 99
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I welcome to all of you if you want to discuss about any topic. Researchers, teachers and students are allowed to use the content for non commercial offline purpose. Further, You must use the reference of the website, if you want to use the partial content for research purpose.
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