Create singlelinkedlist.c

singlelinkedlist.c

@@ -0,0 +1,213 @@
+#include<stdio.h>
+#include<conio.h>
+void insertionbeg();
+void insertionend();
+void insertionmid();
+void deletionbeg();
+void deletionend();
+void deletionmid();
+void search();
+void display();
+struct node{
+int data;
+struct node *next;
+};
+struct node* head=NULL;
+int main()
+{
+int ch;
+do{
+
+printf("enter choice 1 for insertionbeg 2 for insertionend 3 for insertionmid 4 for deletionbeg 5 for deletionend 6 for deletionmid 7 for search 8 for display");
+scanf("%d",&ch);
+switch(ch)
+{
+case 1:insertionbeg();
+      break;
+case 2:insertionend();
+      break;
+case 3:insertionmid();
+      break;
+case 4:deletionbeg();
+      break;
+case 5:deletionend();
+      break;
+case 6:deletionmid();
+      break;
+case 7:search();
+      break;
+case 8:display();
+      break;
+default:printf("enter choice properly");
+       break;
+
+
+}
+
+}while(ch!=9);
+}
+void insertionbeg()
+{
+int val;
+printf("enter value ");
+scanf("%d",&val);
+struct node*newnode=malloc(sizeof(struct node*));
+newnode->data=val;
+newnode->next=head;
+head=newnode;
+}
+void insertionend()
+{
+int val;
+printf("enter value ");
+scanf("%d",&val);
+struct node*newnode=malloc(sizeof(struct node*));
+newnode->data=val;
+newnode->next=NULL;
+if(head==NULL)
+{
+head=newnode;
+}
+else
+{
+struct node*temp=head;
+while(temp->next!=NULL)
+{
+temp=temp->next;
+}
+temp->next=newnode;
+}
+}
+void insertionmid()
+{
+struct node*newnode,*temp;
+int i,pos;
+printf("enter position");
+scanf("%d",&pos);
+int val;
+printf("enter value ");
+scanf("%d",&val);
+struct node*newnode2=malloc(sizeof(struct node*));
+newnode2->data=val;
+newnode2->next=NULL;
+if(head==NULL)
+{
+head=newnode;
+}
+else
+{
+struct node*temp=head;
+for(i=0;i<pos-1;i++)
+{
+temp=temp->next;
+if(temp==NULL)
+break;
+}
+if(temp!=NULL)
+{
+newnode2->next=temp->next;
+temp->next=newnode2;
+}
+}
+}
+void deletionbeg()
+{
+struct node*ptr;
+if(head==NULL)
+{
+printf("cannot delete");
+}
+else
+{
+ptr=head;
+head=ptr->next;
+free(ptr);
+}
+}
+void deletionend()
+{
+struct node*ptr,*ptr1;
+if(head==NULL)
+{
+printf("list is empty");
+}
+else if(head->next==NULL)
+{
+head=NULL;
+free(head);
+printf("only one node deleted ");
+
+}
+else
+{
+ptr=head;
+while(ptr->next!=NULL)
+{
+ptr1=ptr;
+ptr=ptr->next;
+
+}
+ptr1->next=NULL;
+free(ptr);
+printf("deleted node from last");
+}
+}
+void deletionmid()
+{
+int i,pos;
+printf("enter position");
+scanf("%d",&pos);
+struct node*temp=head;
+for(i=0;i<pos-1;i++)
+{
+temp=temp->next;
+}
+temp->next=temp->next->next;
+
+
+}
+void search()
+{
+struct node*ptr;
+int item,i=0,flag;
+ptr=head;
+if(ptr==NULL)
+{
+printf("empty list");
+}
+else
+{
+printf("enter item");
+scanf("%d",&item);
+while(ptr!=NULL)
+{
+if(ptr->data==item)
+{
+printf("item found at %d",i+1);
+flag=0;
+break;
+}
+else
+{
+flag=1;
+}
+i++;
+ptr=ptr->next;
+}
+if(flag==1)
+{
+printf("not found");
+}
+}
+}
+void display()
+{
+struct node*newnode,*temp;
+temp=head;
+while(temp!=NULL)
+{
+printf("%d  ",temp->data);
+temp=temp->next;
+}
+printf("\n");
+}