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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 
Standard input is empty
stdout 
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:
7 years ago
visibility:
public

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