C Program to Concatenate two singly linked lists
Write a C Program to Concatenate two singly linked lists. Here’s simple Menu Driven Program to Concatenate two singly linked lists in C Programming Language.
What is Linked List ?
Linked list is a linear data structure that contains sequence of elements such that each element links to its next element in the sequence. Each link contains a connection to another link.
Following are the important terms to understand the concept of Linked List.
- Link − Each link of a linked list can store a data called an element.
- Next − Each link of a linked list contains a link to the next link called Next.
Each element in a linked list is called as “Node”. Each node consists of its own data and the address of the next node and forms a chain. Linked Lists are used to create trees and graphs.
Basic Operations
Following are the basic operations supported by a list.
- Insertion − Adds an element at the beginning of the list.
- Deletion − Deletes an element at the beginning of the list.
- Display − Displays the complete list.
- Search − Searches an element using the given key.
- Delete − Deletes an element using the given key.
Below is the source code for C Program to Concatenate two singly linked lists which is successfully compiled and run on Windows System to produce desired output as shown below :
SOURCE CODE : :
/* C Program to Concatenate two singly linked lists*/ #include<stdio.h> #include<stdlib.h> struct node { int info; struct node *link; }; struct node *create_list(struct node *); struct node *concat( struct node *start1,struct node *start2); struct node *addatbeg(struct node *start, int data); struct node *addatend(struct node *start,int data); void display(struct node *start); int main() { struct node *start1=NULL,*start2=NULL; start1=create_list(start1); start2=create_list(start2); printf("\nFirst list is : "); display(start1); printf("\nSecond list is : "); display(start2); start1=concat(start1, start2); printf("\nConcatenated list is : "); display(start1); return 0; }/*End of main()*/ struct node *concat( struct node *start1,struct node *start2) { struct node *ptr; if(start1==NULL) { start1=start2; return start1; } if(start2==NULL) return start1; ptr=start1; while(ptr->link!=NULL) ptr=ptr->link; ptr->link=start2; return start1; } struct node *create_list(struct node *start) { int i,n,data; printf("\nEnter the number of nodes : "); scanf("%d",&n); start=NULL; if(n==0) return start; printf("Enter the element to be inserted : "); scanf("%d",&data); start=addatbeg(start,data); for(i=2;i<=n;i++) { printf("Enter the element to be inserted : "); scanf("%d",&data); start=addatend(start,data); } return start; }/*End of create_list()*/ void display(struct node *start) { struct node *p; if(start==NULL) { printf("\nList is empty\n"); return; } p=start; while(p!=NULL) { printf("%d ", p->info); p=p->link; } printf("\n"); }/*End of display() */ struct node *addatbeg(struct node *start,int data) { struct node *tmp; tmp=(struct node *)malloc(sizeof(struct node)); tmp->info=data; tmp->link=start; start=tmp; return start; }/*End of addatbeg()*/ struct node *addatend(struct node *start, int data) { struct node *p,*tmp; tmp= (struct node *)malloc(sizeof(struct node)); tmp->info=data; p=start; while(p->link!=NULL) p=p->link; p->link=tmp; tmp->link=NULL; return start; }/*End of addatend()*/
OUTPUT : :
/* C Program to Concatenate two singly linked lists*/ ***************** OUTPUT ******************** Enter the number of nodes : 5 Enter the element to be inserted : 1 Enter the element to be inserted : 2 Enter the element to be inserted : 3 Enter the element to be inserted : 4 Enter the element to be inserted : 5 Enter the number of nodes : 5 Enter the element to be inserted : 6 Enter the element to be inserted : 7 Enter the element to be inserted : 8 Enter the element to be inserted : 9 Enter the element to be inserted : 0 First list is : 1 2 3 4 5 Second list is : 6 7 8 9 0 Concatenated list is : 1 2 3 4 5 6 7 8 9 0
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