Please help me

[bigben]

When I use the code as follows:

struct node{
int data;
int expn;
node *next;
}
node *input(){
cout<<"Please input the datas:"<<endl;
cout<<"data: expn:"<<endl;
node *root,*p;
root=NULL;
int data,expn;
while((data!=0)&&(expn!=0)){
cin>>data>>expn;
if (data==0 && expn==0) break;
p=new node;
p->data=data;
p->expn=expn;
p->next=NULL;
insert(root,p);
}
return root;
}

The fuction is used to creating a linked list .When I use the function twice:
Just like
node *A,*B;
A=input();
B=input();
The second call will be not in use.
Could someone help me?
Thanks a lot!

[UnclePunker]

When I use the code as follows:

struct node
{ 
    int data; 
    int expn; 
    node *next; 
}
 
node *input()
{ 
    cout<<"Please input the datas:"<<endl; 
    cout<<"data: expn:"<<endl; 
    node *root,*p; 
    root=NULL; 
    int data,expn;
 
    while((data!=0)&&(expn!=0))
    { 
        cin>>data>>expn; 
        if (data==0 && expn==0) break; 
        p=new node; 
        p->data=data; 
        p->expn=expn; 
        p->next=NULL; 
        insert(root,p); 
    }
 
    return root; 
}

The fuction is used to creating a linked list .When I use the function twice:
Just like
node *A,*B;
A=input();
B=input();
The second call will be not in use.
Could someone help me?
Thanks a lot!

[sweets]

If I haven't misunderstood you, I have made some modifications to your initial program.

struct node
{ 
   int data; 
   int expn; 
   node *next;
}; <---- YOU NEED A SEMICOLON

//---------------------------------------------------------
node*  input()
{
  node *head, *curr;
  int data, expn; 
  
  head=curr=NULL; 

  cout<<"Please input the datas:"<<endl; 
  cout<<"data: expn:"<<endl; 
  cin >> data >> expn;  // <-- USED FOR INITIAL LOOP ENTRY

  while((data!=0)&&(expn!=0))
  { 

      if (head==NULL)  //  <--- USED ONLY THE FIRST TIME
      {
          head=new node;
          head->data=data;
          head->expn=expn;
          head->next=NULL;
          curr=head;
      }
      else     // <-- ALL OTHER NODES WILL BE CREATED HERE
      {
          curr->next=new node; 
          curr=curr->next;
          curr->data=data; 
          curr->expn=expn; 
          curr->next=NULL; 
      }

      clrscr ();
      cout << "Please input the datas: " << endl; 
      cout << "data: expn: " << endl; 
      cin >> data >> expn;
   } 
   return head;
}

Hope this helps

Sophie

[bigben]

Thank you.
Infact the first call
A=input();
works,
but it doesn't work a second time.
the call B=input(); could output the
string,but I cannot input anything at
all,it passes to next line.

[sweets]

So......have you still got a problem or is it solved?

[bigben]

I know now, thanks.
I got a mistake and I did not initilize the
data and expn.
Is it?
Thanks for your help!