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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. struct item
  5. {
  6.     int numItems = 0;
  7.     float price = 0;
  8.     double foo = 0;
  9.  
  10.     item(int num, float pr, double f)
  11.     {
  12.         numItems = num;
  13.         price = pr;
  14.         foo = f;
  15.     }
  16. };
  17.  
  18. template <class T>
  19. void printValues(item* vecItemPtr, T item::* targetElemPtr, int numItems)
  20. {
  21.     for (int i = 0; i < numItems; i++)
  22.     {
  23.         std::cout << (vecItemPtr[i].*targetElemPtr) << std::endl;
  24.     }
  25. }
  26.  
  27. int main()
  28. {
  29.     std::vector<item> test;
  30.  
  31.     item item1(10, 3.0f, 8);
  32.     item item2(20, 1.0f, 4);
  33.  
  34.     test.reserve(2);
  35.     test.push_back(item1);
  36.     test.push_back(item2);
  37.  
  38.     // Say I want to print numItems, 
  39.     printValues(test.data(), &item::numItems, test.size());
  40.  
  41.     // Say I want to print price
  42.     printValues(test.data(), &item::price, test.size());
  43.  
  44.     // Say I want to print foo
  45.     printValues(test.data(), &item::foo, test.size());
  46. }
Success #stdin #stdout 0.01s 5276KB
comments ()
stdin 
Standard input is empty
stdout 
10
20
3
1
8
4
https://ideone.com/gDQMDU
language:
C++ 4.3.2 (gcc-4.3.2)
created:
3 years ago
visibility:
public

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