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  1. #include <stdio.h>
  2.  
  3. typedef void* (*function_pointer_t)(int index);
  4.  
  5. struct function_holder {
  6. 	function_pointer_t callback;
  7. };
  8.  
  9. void* testFn(int i)
  10. {
  11. 	printf("testFn %d\n", i);
  12. }
  13.  
  14. int main(void) {
  15.     struct function_holder fh = { testFn };
  16.     struct function_holder* fhp = &fh;
  17.  
  18.     fh.callback = testFn;
  19.     fh.callback(1);
  20.     fhp->callback(2);
  21.  
  22. 	return 0;
  23. }
  24.  
Success #stdin #stdout 0s 2248KB
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stdin
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Standard input is empty
stdout
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testFn 1
testFn 2
https://ideone.com/1syLlG
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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