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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. struct data {
  6.   char *name;
  7.   struct data *next;
  8. };
  9.  
  10. static struct data *alloc_data(char *name)
  11. {
  12.   struct data *data;
  13.  
  14.   data = calloc(1, sizeof(*data));
  15.   if (data == NULL)
  16.     return NULL;
  17.  
  18.   data->name = calloc(1, strlen(name));
  19.   if (data->name == NULL)
  20.     goto err;
  21.  
  22.   strcpy(data->name, name);
  23.   data->next = NULL;
  24.   return data;
  25.  
  26.  err:
  27.   free(data);
  28.   return NULL;
  29. }
  30.  
  31. static void free_data(struct data *data)
  32. {
  33.   free(data->name);
  34.   free(data);
  35. }
  36.  
  37. static struct data *append_list(struct data *list, char *name)
  38. {
  39.   struct data *top;
  40.  
  41.   if (list == NULL) {
  42.     list = alloc_data(name);
  43.     return list;
  44.   }
  45.  
  46.   top = alloc_data(name);
  47.   top->next = list;
  48.   return top;
  49. }
  50.  
  51. static void free_list(struct data *list)
  52. {
  53.   while (list != NULL) {
  54.     struct data *data = list->next;
  55.     free_data(list);
  56.     list = data;
  57.   }
  58. }
  59.  
  60. static void print_list(struct data *list)
  61. {
  62.   while (list != NULL) {
  63.     printf("%s\n", list->name);
  64.     list = list->next;
  65.   }
  66. }
  67.  
  68. int main(void)
  69. {
  70.   struct data *list;
  71.   int i;
  72.   char *buffer;
  73.  
  74.   buffer = calloc(1, 128);
  75.   if (buffer == NULL)
  76.     return 1;
  77.  
  78.   list = NULL;
  79.   for (i = 0; i < 10; i++) {
  80.     memset(buffer, 0, 128);
  81.     scanf("%127s", buffer);
  82.     list = append_list(list, buffer);
  83.   }
  84.  
  85.   print_list(list);
  86.  
  87.   free_list(list);
  88.   free(buffer);
  89.  
  90.   return 0;
  91. }
  92.  
Success #stdin #stdout 0s 1924KB
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https://ideone.com/Eu5mzf
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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