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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4. using namespace std;
  5.  
  6. struct Vector3
  7. {
  8. 	Vector3( const int& a, const int& b, const int& c )
  9. 	{
  10. 	m_iaData[0] = a;
  11. 	m_iaData[1] = b;
  12. 	m_iaData[2] = c;
  13. 	}
  14.  
  15. 	int m_iaData[3];
  16. };
  17.  
  18. class Comparsion
  19. {
  20. 	public:
  21. 		int idx;
  22. 		Comparsion(const int& i):idx(i){};
  23. 		bool operator() ( const Vector3& v1, const Vector3& v2 ) const
  24.   		{
  25.      		return v1.m_iaData[idx] < v2.m_iaData[idx];
  26.    		}
  27. };
  28.  
  29. int main() {
  30. 	// your code goes here
  31. 	vector<Vector3> v3;
  32. 	Vector3 AA(10,0,0);
  33. 	v3.push_back(AA);
  34. 	Vector3 BB(20,0,0);
  35. 	v3.push_back(BB);
  36. 	Vector3 CC(30,0,0);
  37. 	v3.push_back(CC);
  38.  
  39. 	sort(v3.begin(),v3.end(),Comparsion(0));
  40.  
  41. 	for(vector<Vector3>::iterator it = v3.begin(); it !=v3.end(); ++it)
  42. 	{
  43. 		cout << (*it).m_iaData[0] << endl;
  44. 	}
  45. 	return 0;
  46. }
Success #stdin #stdout 0s 3476KB
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https://ideone.com/w6fBR0
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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