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  1. #include <iostream>
  2. #include <algorithm>
  3. #include <vector>
  4. using namespace std;
  5.  
  6. template< class T >
  7. struct ColumnAdapter {
  8. 	ColumnAdapter( size_t column ) : m_column( column ) {}
  9. 	bool operator()( const std::vector< T > & left, const std::vector< T > & right ) {
  10. 		return left.at( m_column ) < right.at( m_column );
  11. 	}
  12. private:
  13.     size_t m_column;
  14. };
  15.  
  16. int main() {
  17. 	std::vector< std::vector< int > > v = {
  18. 		{ 2,  3, 4, 5, 6, 7 },
  19. 		{ 1,  2, 3, 4, 5, 6 },
  20. 		{ 20, 30, 40, 50, 60, 70 },
  21. 		{ 2,  3, 4, 5, 6, 7 },
  22. 	};
  23. 	const size_t COLUMN = 1;
  24.  	auto biggest = std::max_element(std::begin(v), std::end(v), ColumnAdapter< int >( COLUMN ) );
  25.     std::cout << "Max element is " << (*biggest).at( COLUMN )
  26.         << " at position " << std::distance(std::begin(v), biggest) << std::endl;
  27.  
  28.     auto smallest = std::min_element(std::begin(v), std::end(v), ColumnAdapter< int >( COLUMN ) );
  29.     std::cout << "min element is " << (*smallest).at( COLUMN )
  30.         << " at position " << std::distance(std::begin(v), smallest) << std::endl;	
  31. 	return 0;
  32. }
Success #stdin #stdout 0s 3432KB
comments (?)
stdin 
Standard input is empty
stdout 
Max element is 30 at position 2
min element is 2 at position 1
https://ideone.com/P9D4jo
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

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