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  1. #include <stdio.h>
  2. #include <sys/queue.h>
  3.  
  4. struct foo {
  5.     TAILQ_ENTRY(foo) tailq;
  6.     int datum;
  7. };
  8.  
  9. struct foo foo (int val) {
  10.     struct foo x = { { 0, 0 }, val };
  11.     return x;
  12. }
  13.  
  14. TAILQ_HEAD(fooq, foo);
  15.  
  16. int main ()
  17. {
  18.     struct fooq q;
  19.     struct foo data[3] = { foo(3), foo(7), foo(1) };
  20.     struct foo *p;
  21.  
  22.     TAILQ_INIT(&q);
  23.     TAILQ_INSERT_HEAD(&q, &data[0], tailq);
  24.     TAILQ_INSERT_AFTER(&q, &data[0], &data[1], tailq);
  25.     TAILQ_INSERT_TAIL(&q, &data[2], tailq);
  26.  
  27.     TAILQ_FOREACH(p, &q, tailq) {
  28.         printf(" %d", p->datum);
  29.     }
  30.     puts("");
  31.  
  32.     TAILQ_FOREACH_REVERSE(p, &q, fooq, tailq) {
  33.         printf(" %d", p->datum);
  34.     }
  35.     puts("");
  36.  
  37.     while (!TAILQ_EMPTY(&q)) {
  38.         p = TAILQ_FIRST(&q);
  39.         TAILQ_REMOVE(&q, p, tailq);
  40.     }
  41.  
  42.     return 0;
  43. }
  44.  
Success #stdin #stdout 0s 2292KB
comments (?)
stdin
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Standard input is empty
stdout
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 3 7 1
 1 7 3
https://ideone.com/D67BHW
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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