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  1. /// #include "stdafx.h"
  2. #include <stdio.h> ///
  3. #include <vector>
  4. #define fp32 float 
  5. #define u32 unsigned int 
  6. class BV
  7. {
  8. public:
  9. 	BV(fp32 x, fp32 y)
  10. 		: _x(x)
  11. 		, _y(y)
  12. 	{
  13. 	}
  14.  
  15. public:
  16. 	fp32 _x;
  17. 	fp32 _y;
  18. };
  19. std::pair<u32, BV&> GetValue(std::vector<BV>& values, u32 index)
  20. {
  21. 	/// return std::make_pair(index, values[index]);
  22. 	return std::make_pair<u32, BV&>(index, values[index]); ///
  23. }
  24.  
  25. void TestAll()
  26. {
  27. 	std::vector<BV> values;
  28. 	values.push_back(BV(0.0, 0.0));
  29. 	values.push_back(BV(2.0, 0.0));
  30. 	values.push_back(BV(3.0, 0.0));
  31. 	std::pair<u32, BV&> pair1 = GetValue(values, 0);
  32. 	BV& val1 = GetValue(values, 0).second;
  33. 	//BV& val1 = pair1.second;
  34. 	fp32 a = val1._x + 1.0f;
  35. 	std::pair<u32, BV&> pair2 = GetValue(values, 0);
  36. 	BV& val2 = GetValue(values, 2).second;
  37. 	//BV& val2 = pair1.second;
  38. 	fp32 b = val2._x + 1.0f;
  39. 	printf("val1 x = %f; y = %f;\n", val1._x, val1._y);
  40. 	printf("val2 x = %f; y = %f;\n", val2._x, val2._y);
  41. 	fp32 c = val1._x + 1.0f;
  42. 	printf("val1 x = %f; y = %f;\n", val1._x, val1._y);
  43. 	printf("val2 x = %f; y = %f;\n", val2._x, val2._y);
  44. }
  45.  
  46. /// int _tmain(int argc, _TCHAR* argv[])
  47. int main() ///
  48. {	
  49. 	TestAll();
  50. 	return 0;
  51. }
Success #stdin #stdout 0s 3412KB
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stdin
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Standard input is empty
stdout
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val1 x = 0.000000; y = 0.000000;
val2 x = 3.000000; y = 0.000000;
val1 x = 0.000000; y = 0.000000;
val2 x = 3.000000; y = 0.000000;
https://ideone.com/2dBT3R
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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