c - Linked List elements not getting displayed -


this program in c inserts linked list @ end. when try print list elements, nothing displayed. here code :

#include<stdio.h> #include<stdlib.h> struct node {     int data;     struct node *next; }; void insert(struct node *, int); int main(void) {     struct node *head = null, *current;     int n, i, x, data;     scanf("%d", &n);     for(i = 0; < n; i++)     {         scanf("%d", &data);         insert(head, data);     }     current = head;     while(current != null)     {         printf("%d ", current->data);         current = current->next;     } } void insert(struct node *head, int data) {     struct node *newnode, *current = head;     newnode = (struct node *)malloc(sizeof(struct node));     newnode->data = data;     newnode->next = null;     if(head == null)     {         head = newnode;     }     else     {         while(current->next != null)         {             current = current->next;         }         current->next = newnode;     } }

i cannot understand might issue. please help.

here, while passing head pointer insert() function, not being updated in main() function.

so, either declare head pointer global or return head pointer , update in main() function.

in below code had taken head pointer global , removed head pointer parameter insert() function.

here code :-

#include<stdio.h> #include<stdlib.h> struct node {     int data;     struct node *next; }; struct node *head=null; void insert(int); int main(void) {     struct node  *current;     int n, i, x, data;     clrscr();     scanf("%d", &n);     for(i = 0; < n; i++)     {     scanf("%d", &data);     insert(data);     }     current = head;     while(current != null)     {     printf("%d \n", current->data);     current = current->next;     }     getch();     return 0; } void insert(int data) {     struct node *newnode, *current = head;     newnode = (struct node *)malloc(sizeof(struct node));     newnode->data = data;     newnode->next = null;     if(head == null)     {     head = newnode;     }     else     {     while(current->next != null)         {             current = current->next;         }         current->next = newnode;     } }

Comments

Post a Comment

Popular posts from this blog

php - Vagrant up error - Uncaught Reflection Exception: Class DOMDocument does not exist -

i've set bento/ubuntu-16.04 vagrant box using php 5.6, , getting following error quite few times when try , run shell script: "uncaught reflection exception: class domdocument not exist". i've tried adding following top of script (not together), each no success: "sudo apt-get install php5.6-xml", "sudo apt-get install php5-xml", "sudo apt-get install php-dom" i've tried resetting server "sudo service apache2 restart". does have suggestions?
Read more

vue.js - Create hooks for automated testing -

Image
qa guys complained can't automate frontend testing. because our html looks same outside. lazy hack did this <template> <div :role="$options.name"> ... </div> </template> <script> export default { name: 'vmcomponentname' } </script> which takes name script , applies html. in browser get: <div role="vmcomponentname"> ... </div> line :role="$options.name" goes in every component. is there dry er solutions? please share. additional details i'll explain in details looking for. imagine have vmusercreate form creates user. test case can create user . to automatically test without role, have use following selector: .wrapper > .wrapper > .wrapper > .submit-button the test extremely brittle (will break lot). if use roles can use [role="vmusercreateform"] .submit-button selector. many folds less brittle. so basically, i'm ...
Read more

Add new key value to json node in java -

i have json file : { "id":1, "name":"abc", "addressdetails": { "city":"newyork" } } i wanted add 1 more key-value ("pincode" : "414141") node 'addressdetails'. i tried using : objectmapper mapper = new objectmapper(); jsonnode root = mapper.readtree(new file("d://test.json")); objectnode node = mapper.createobjectnode(); node.with("addressdetails").put("pincode", "414141"); but it's not getting added, there way can ? you can try you should modify file path objectmapper mapper = new objectmapper(); objectnode nodes = mapper.readvalue(new file("d:\\test.txt"), objectnode.class); nodes.with("addressdetails").put("pincode", "414141"); mapper.writer().writevalue(new file("d:\\test.txt"), nodes);
Read more