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  1. #include <stddef.h>
  2. #include <stdio.h>
  3. #include <stdlib.h>
  4.  
  5. typedef struct
  6. {
  7.   int *data;
  8.   size_t size;
  9. } *dynamic_array;
  10.  
  11. dynamic_array create_dynamic_array()
  12. {
  13.   dynamic_array array = malloc(sizeof(*array));
  14.   array->data = NULL;
  15.   array->size = 0;
  16.   return array;
  17. }
  18.  
  19. void* append_to_dynamic_array(dynamic_array array, int value)
  20. {
  21.   int *new_array = realloc(array->data, (array->size+1) * sizeof(*array->data));
  22.   if (new_array)
  23.     {
  24.       array->data = new_array;
  25.       new_array[array->size] = value;
  26.       ++array->size;
  27.     }
  28.   return new_array;
  29. }
  30.  
  31. void destroy_dynamic_array(const dynamic_array array)
  32. {
  33.   free(array->data);
  34.   free(array);
  35. }
  36.  
  37. int get_from_dynamic_array(const dynamic_array array, size_t index)
  38. {
  39.   return array->data[index];
  40. }
  41.  
  42. size_t get_size_of_dynamic_array(const dynamic_array array)
  43. {
  44.   return array->size;
  45. }
  46.  
  47. int main()
  48. {
  49.   dynamic_array my_array = create_dynamic_array();
  50.   int value; 
  51.   size_t i; 
  52.  
  53.   while(scanf("%d", &value) == 1)
  54.     {
  55.       if (!append_to_dynamic_array(my_array, value))
  56.         {
  57.           puts("Au weia! Kein Speicher mehr.");
  58.         }
  59.     }
  60.  
  61.   puts("Arrayinhalt:");
  62.   for(i = 0; i < get_size_of_dynamic_array(my_array); ++i)
  63.     printf("%d\n", get_from_dynamic_array(my_array, i));
  64.  
  65.  
  66.   destroy_dynamic_array(my_array);
  67. }
  68.  
Success #stdin #stdout 0s 2428KB
comments (?)
stdin
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5 8 5 4 8 2 1 3 6 6 9 7 2
stdout
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Arrayinhalt:
5
8
5
4
8
2
1
3
6
6
9
7
2
https://ideone.com/dgAi8c
language:
C (gcc 8.3)
created:
9 years ago
visibility:
public

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