Rotate a linked list
- by user408041
I want to rotate a linked list that contains a number. 123 should be rotated to 231. The function created 23 but the last character stays empty, why?
typedef struct node node;
struct node{
char digit;
node* p;
};
void rotate(node** head){
node* walk= (*head);
node* prev= (*head);
char temp= walk->digit;
while(walk->p!=NULL){
walk->digit=walk->p->digit;
walk= walk->p;
}
walk->digit=temp;
}
How I create the list:
node* convert_to_list(int num){
node * curr, * head;
int i=0,length=0;
char *arr=NULL;
head = NULL;
length =(int) log10(((double) num))+1;
arr =(char*) malloc((length)*sizeof(char)); //allocate memory
sprintf (arr, "%d" ,num); //(num, buf, 10);
for(i=length;i>=0;i--) {
curr = (node *)malloc(sizeof(node));
(curr)->digit = arr[i];
(curr)->p = head;
head = curr;
}
curr = head;
return curr;
}
