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  1. #include<iostream>
  2. using namespace std;
  3. struct node
  4. {
  5.     int val;
  6.     node *next;
  7. };
  8. void traverse(node *head)
  9. {
  10.     node *temp=head;
  11.     while(temp)
  12.     {
  13.         cout<<temp->val<<" ";
  14.         temp=temp->next;
  15.     }
  16. }
  17. int main()
  18. {
  19.     node *head=NULL;
  20.     for(int i=0; i<5; i++)
  21.     {
  22.         node *ptr=new node;
  23.         cin>>ptr->val;
  24.         ptr->next=NULL;
  25.         ptr->next=head;
  26.         head=ptr;
  27.     }
  28.     traverse(head);
  29.     cout<<endl;
  30.     node *prev=NULL;
  31.     node *cur=head;
  32.     node *n=head->next;
  33.     while(cur)
  34.     {
  35.         n=cur->next;
  36.         cur->next=prev;
  37.         prev=cur;
  38.         cur=n;
  39.     }
  40.     head=prev;
  41.     traverse(head);
  42. }
Success #stdin #stdout 0.01s 5308KB
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stdin
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Standard input is empty
stdout
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0 0 0 0 0 
0 0 0 0 0
https://ideone.com/HBFauX
language:
C++14 (gcc 8.3)
created:
16 days ago
visibility:
public

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