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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. struct Pair{
  6. 	int a;
  7. 	int b;
  8. };
  9.  
  10. ostream& operator<<(ostream& os, const Pair& p) {
  11. 	return os<<"("<<p.a<<", "<<p.b<<")";
  12. }
  13.  
  14. void find_ptr_member(Pair array[], int size, int Pair::*where, int what){
  15. 	for(int i=0;i<size;++i){
  16. 		if(array[i].*where==what){
  17. 			cout<<"Found with pointer to member "<<array[i]<<endl;
  18. 		}
  19. 	}
  20. }
  21.  
  22. void find_ptr_func(Pair array[], int size, bool (*isIt)(Pair&)){
  23. 	for(int i=0;i<size;++i){
  24. 		if(isIt(array[i])){
  25. 			cout<<"Found with pointer to function "<<array[i]<<endl;
  26. 		}
  27. 	}
  28. }
  29.  
  30. #define FIND_MACRO(array, size, member, value) {       \
  31. 	for(int i=0;i<size;++i){                           \
  32. 		if(array[i].member==value){                    \
  33. 			cout<<"Found with macro "<<array[i]<<endl; \
  34. 		}                                              \
  35. 	}                                                  \
  36. }
  37.  
  38. int main() {
  39. 	Pair p[10];
  40. 	for(int i=0;i<10;++i){
  41. 		p[i].a=i;
  42. 		p[i].b=10-i;
  43. 	}
  44. 	find_ptr_member(p,10,&Pair::b,3);
  45. 	find_ptr_func(p,10,[](Pair&p){return p.b==6;});
  46. 	FIND_MACRO(p,10,b,2);
  47. 	return 0;
  48. }
Success #stdin #stdout 0s 16064KB
comments (?)
stdin
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Standard input is empty
stdout
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Found with pointer to member (7, 3)
Found with pointer to function (4, 6)
Found with macro (8, 2)
https://ideone.com/QF1cN8
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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