fork download
copy 
  1. #include <iostream>
  2. using namespace std;
  3.  
  4. template<class T, size_t Length> struct Sum {
  5. 	template<class Array>
  6. 	static T comp(const Array &x, T add = 0) {
  7. 		return Sum<T, Length - 1>::comp(x, add + Length * x[Length - 1]);
  8. 	}
  9. };
  10.  
  11. template<class T> struct Sum<T, 0> {
  12. 	template<class Array>
  13. 	static T comp(const Array &x, T add = 0) {
  14. 		return add;
  15. 	}
  16. };
  17.  
  18. constexpr int d[] = { 0, 1, 1, 0, 1 };
  19. constexpr int e[] = { 1, 0, 3, 2, 4 };
  20.  
  21. template<int N> struct Comp {
  22. 	template<class Array>
  23. 	static int comp(const Array &x) {
  24. 		return d[N] ? Sum<int, e[N]>::comp(x) : 10;
  25. 	}
  26. };
  27.  
  28. int main() {
  29. 	int x[] = { 1, 3, 5, 7, 9 };
  30.  
  31. 	cout << Comp<0>::comp(x) << endl;
  32. 	cout << Comp<1>::comp(x) << endl;
  33. 	cout << Comp<2>::comp(x) << endl;
  34. 	cout << Comp<3>::comp(x) << endl;
  35. 	cout << Comp<4>::comp(x) << endl;
  36.  
  37. 	return 0;
  38. }
Success #stdin #stdout 0s 3296KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
10
0
22
10
50
https://ideone.com/PmFBhU
language:
C++14 (gcc 8.3)
created:
10 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!