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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. #define ACTION_OPEN_FILE       0
  5. #define ACTION_WRITE_TO_STDOUT 1
  6.  
  7. typedef struct action_open_file
  8. {
  9. 	int         type;
  10. 	const char *path;
  11. 	FILE       *file;
  12. } action_open_file_t;
  13.  
  14. typedef struct action_write_to_stdout
  15. {
  16. 	int         type;
  17. 	const char *string;
  18. } action_write_to_stdout_t;
  19.  
  20. void execute_action_open_file(action_open_file_t *action)
  21. {
  22. 	printf("the open file action is called.\n");
  23.  
  24. 	action->file = !NULL; /* Типа открыл. */
  25. }
  26.  
  27. void execute_action_write_to_stdout(action_write_to_stdout_t *action)
  28. {
  29. 	printf("the write to stdout action is called.\n");
  30.  
  31. 	printf("%s\n", action->string);
  32. }
  33.  
  34. void execute_action(void *action)
  35. {
  36. 	switch (*(int *)action)
  37. 	{
  38. 		case ACTION_OPEN_FILE:
  39. 			return execute_action_open_file(action);
  40.  
  41. 		case ACTION_WRITE_TO_STDOUT:
  42. 			return execute_action_write_to_stdout(action);
  43. 	}
  44. }
  45.  
  46. int main(void) 
  47. {
  48. 	action_open_file_t action_1 =
  49. 	{
  50. 		.type = ACTION_OPEN_FILE,
  51. 		.path = "...",
  52. 		.file = NULL
  53. 	};
  54.  
  55. 	action_write_to_stdout_t action_2 =
  56. 	{
  57. 		.type = ACTION_WRITE_TO_STDOUT,
  58. 		.string = "Hello World"
  59. 	};
  60.  
  61. 	execute_action(&action_1); /* Вызывается функция execute_action_open_file. */
  62. 	execute_action(&action_2); /* Вызывается функция execute_action_write_to_stdout. */
  63.  
  64. 	return EXIT_SUCCESS;
  65. }
  66.  
Success #stdin #stdout 0s 5400KB
comments (?)
stdin
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Standard input is empty
stdout
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the open file action is called.
the write to stdout action is called.
Hello World
https://ideone.com/1vCdB8
language:
C (gcc 8.3)
created:
2 years ago
visibility:
secret

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