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  1. #include <iostream>
  2. #include <vector>
  3. #include <string>
  4. #include <limits>
  5. using namespace std;
  6.  
  7. struct Object {
  8.     std::string name;
  9.     int a;
  10.     int b;
  11.     int c;
  12. };
  13.  
  14. class ObjectCollection {
  15.     size_t getMaxIndexOf(int Object::* o); // private helper function 
  16. public:
  17.     std::vector<Object> collection;
  18.     size_t getMaxIndexOfA();
  19.     size_t getMaxIndexOfB();
  20.     size_t getMaxIndexOfC();
  21. };
  22.  
  23. size_t ObjectCollection::getMaxIndexOf(int Object::* o) {
  24.     size_t maxIndex = -1;
  25.     int max = std::numeric_limits<int>::min();
  26.     for (size_t i = 0; i < collection.size(); ++i) {
  27.        if (collection[i].*o > max) {
  28.            maxIndex = i;
  29.            max = collection[i].*o; 
  30.        }
  31.     }
  32.     return maxIndex;
  33. }
  34. size_t ObjectCollection::getMaxIndexOfA() {
  35.     return getMaxIndexOf(&Object::a);
  36. }
  37. size_t ObjectCollection::getMaxIndexOfB() {
  38.     return getMaxIndexOf(&Object::b);
  39. }
  40. size_t ObjectCollection::getMaxIndexOfC() {
  41.     return getMaxIndexOf(&Object::c);
  42. }
  43. int main() {
  44. 	ObjectCollection c;  
  45. 	c.collection.push_back({"test0" , 1,2,3 }); 
  46. 	c.collection.push_back({"test1" , 2,1,4 }); 
  47. 	c.collection.push_back({"test2" , 3,1,2 }); 
  48. 	cout << c.getMaxIndexOfA() <<" " << c.getMaxIndexOfB() <<" " << c.getMaxIndexOfC() <<endl; 
  49. 	return 0;
  50. }
Success #stdin #stdout 0s 4420KB
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https://ideone.com/kqLegl
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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