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odd-even.c
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odd-even.c
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//program to split linked list
#include <stdio.h>
#include <stdlib.h>
struct node {
int data;
struct node *next;
};
struct node *even = NULL;
struct node *odd = NULL;
struct node *list = NULL;
//Create Linked List
void insert(int data) {
// Allocate memory for new node;
struct node *link = (struct node*) malloc(sizeof(struct node));
struct node *current;
link->data = data;
link->next = NULL;
if(list == NULL) {
list = link;
return;
}
current = list;
while(current->next!=NULL)
current = current->next;
// Insert link at the end of the list
current->next = link;
}
void display(struct node *head) {
struct node *ptr = head;
printf("[head] =>");
//start from the beginning
while(ptr != NULL) {
printf(" %d =>",ptr->data);
ptr = ptr->next;
}
printf(" [null]\n");
}
void split_list() {
// Allocate memory for new node;
struct node *link;
struct node *current;
while(list != NULL) {
struct node *link = (struct node*) malloc(sizeof(struct node));
link->data = list->data;
link->next = NULL;
if(list->data%2 == 0) {
if(even == NULL) {
even = link;
list = list->next;
continue;
} else {
current = even;
while(current->next != NULL)
current = current->next;
// Insert link at the end of the list
current->next = link;
}
list = list->next;
} else {
if(odd == NULL) {
odd = link;
list = list->next;
continue;
} else {
current = odd;
while(current->next!=NULL)
current = current->next;
// Insert link at the end of the list
current->next = link;
}
list = list->next;
}
}
}
int main() {
int i;
for(i = 1; i <= 10; i++)
insert(i);
printf("Complete list: \n");
display(list);
split_list();
printf("\nOdd : ");
display(odd);
printf("Even : ");
display(even);
return 0;
}