Created
February 22, 2013 13:46
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Reverse linked list in Finnish C...
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#include <stdlib.h> | |
#include <stdio.h> | |
struct node_t{ | |
node_t *seuraava; | |
int val; | |
}; | |
node_t *rev_linked_list(node_t *list) | |
{ | |
node_t *edellinen = NULL; | |
node_t *tama = list; | |
if(!tama){return NULL;} | |
node_t *seuraava = list->seuraava; | |
while(tama){ | |
tama->seuraava = edellinen; | |
edellinen = tama; | |
tama = seuraava; | |
if(seuraava){ | |
seuraava = seuraava->seuraava; | |
} | |
} | |
return edellinen; | |
} | |
void show_list(node_t *ptr) | |
{ | |
while(ptr){ | |
printf("val=%d\n", ptr->val); | |
ptr = ptr->seuraava; | |
} | |
} | |
int main(void) | |
{ | |
node_t n1, n2, n3; | |
n1.val = 1; | |
n2.val = 2; | |
n3.val = 3; | |
n1.seuraava = &n2; | |
n2.seuraava = &n3; | |
n3.seuraava = NULL; | |
node_t * ptr = &n1; | |
show_list(ptr); | |
printf("reversing...\n"); | |
ptr = rev_linked_list(ptr); | |
printf("reversing end...\n"); | |
show_list(ptr); | |
return 0; | |
} | |
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