fork download
copy 
  1. #include<stdio.h>
  2. #include<stdlib.h>
  3.  
  4. typedef void (*FNTYPE)(void);
  5. FNTYPE fn_arr[5];
  6.  
  7. void fun1(void){
  8. 	printf("\n I'm func 1 \n");
  9. }
  10.  
  11. void fun2(void){
  12. 	printf("\n I'm func 2 \n");
  13. }
  14.  
  15.  
  16.  
  17.  
  18. int decidefunc(char* inp){
  19. 	if(inp == NULL){
  20. 		return 0;
  21. 	}
  22. 	else if(*inp == 'a'){
  23. 		return 1;
  24. 	}
  25. 	else if(*inp == 'b'){
  26. 		return 0;
  27. 	}
  28. 	else if(*inp == 'c'){
  29. 		return 1;
  30. 	}
  31. 	else{
  32. 		return 0;
  33. 	}
  34. }
  35.  
  36. void callMyFunc(char* inp){
  37. 	printf("\n %s \n",__func__);
  38. 	int idx = decidefunc(inp);
  39. 	fn_arr[idx]();
  40. }
  41.  
  42. void do_lengthy_op(char* inp,void (*call)(char *inp)){
  43. 	printf("\n do_lengthy_operation! \n");
  44. 	call(inp);
  45. }
  46.  
  47. int main(){
  48. 	fn_arr[0] = &fun1;
  49. 	fn_arr[1] = &fun2;
  50.  
  51. 	do_lengthy_op("b",callMyFunc);
  52. 	return 0;
  53. }
Success #stdin #stdout 0s 2292KB
comments ()
stdin
copy 
Standard input is empty
stdout
copy 
 do_lengthy_operation! 

 callMyFunc 

 I'm func 1
https://ideone.com/vbandN
function pointers
language:
C (gcc 8.3)
created:
11 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!