fork download
copy 
  1. #include <iostream>
  2. //#include <iomanip>
  3. #include <cmath>
  4. using namespace std;
  5.  
  6. template <size_t N>
  7. class Vector { public:
  8. 	float Components[N];
  9. 	void Add(const Vector & right) {
  10. 		for(size_t i = 0; i < N; ++i) {
  11. 			Components[i] += right.Components[i];
  12. 		}
  13. 	}
  14. 	void Subtract(const Vector & right) {
  15. 		for(size_t i = 0; i < N; ++i) {
  16. 			Components[i] -= right.Components[i];
  17. 		}
  18. 	}
  19. 	float LengthSquared() const {
  20. 		float result = 0.0f;
  21. 		for(auto component : Components) {
  22. 			result += component * component;
  23. 		}
  24. 		return result;
  25. 	}
  26.     float Length() const {
  27.         return sqrt(LengthSquared());
  28.     }
  29. };
  30.  
  31. template <size_t N>
  32. ostream & operator<<(ostream & left, const Vector<N> & right) {
  33. 	left<<"{";
  34. 	for(auto component : right.Components) {
  35. 		left<<component<<",";
  36. 	}
  37. 	left<<"}";
  38. 	return left;
  39. }
  40.  
  41. int main() {
  42.     // /O2 /Oi /MACHINE:X64
  43.     // MSC 1800
  44.     // call 命令が含まれる箇所が
  45.     // cout の部分だけにまで展開？された
  46.  
  47. 	Vector<3> v1 = {2.0f,3.0f,0.0f};
  48. 	Vector<3> v2 = {1.0f,5.0f,1.0f}; v2.Subtract(v1);
  49. 	Vector<3> v3 = v1; v3.Add(v2);
  50.  
  51. 	float l1 = v1.Length();
  52. 	float l2 = v2.Length();
  53. 	float l3 = v3.Length();
  54.  
  55. 	cout<<v1<<" "<<l1<<endl;
  56. 	cout<<v2<<" "<<l2<<endl;
  57. 	cout<<v3<<" "<<l3<<endl;
  58. }
Success #stdin #stdout 0s 3340KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
{2,3,0,} 3.60555
{-1,2,1,} 2.44949
{1,5,1,} 5.19615
https://ideone.com/3c6ZD7
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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!