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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. struct data_list {
  6.     struct data_list *next;
  7.     char data[];
  8. };
  9.  
  10. int main(int argc, char **argv)
  11. {
  12.     int res;
  13.     char buf[1024];
  14.     struct data_list data_list = { 0 }, *p, *pp;
  15.     int l;
  16.  
  17.     fputs("文字列を入力してください。ctrl-dで終了:\n", stderr);
  18.     for (;;) {
  19.         fputs("? ", stderr);
  20.         if (fgets(buf, sizeof(buf) - 1, stdin) == NULL)
  21.             break;
  22.         l = strlen(buf);
  23.         for (p = &data_list; p->next != NULL; p = p->next);
  24.         p->next = malloc(sizeof(data_list) + l + 1);
  25.         if (p->next == NULL) {
  26.             perror("Mallocに失敗しました");
  27.             res = 1;
  28.             goto PG_END;
  29.         }
  30.         p->next->next = NULL;
  31.         strcpy(p->next->data, buf);
  32.     }
  33.     putc('\n', stderr);
  34.  
  35.     for (p = data_list.next; p != NULL; p = p->next)
  36.         fputs(p->data, stdout);
  37.  
  38.     res = 0;
  39.   PG_END:;
  40.     // free
  41.     p = data_list.next;
  42.     while (NULL != p) {
  43.         pp = p->next;
  44.         free(p);
  45.         p = pp;
  46.     }
  47.     return res;
  48. }
Success #stdin #stdout 0.01s 1720KB
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https://ideone.com/ahMM2K
language:
C (gcc 8.3)
created:
12 years ago
visibility:
secret

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