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  1. #include <iostream>
  2. #include <algorithm>
  3. #include <iostream>
  4. #include <random>
  5.  
  6. int main()
  7. {
  8. 	const size_t h = 5, w = 8;
  9. 	std::random_device rand;
  10.    	std::mt19937 gen(rand());
  11.    	std::uniform_int_distribution <> distr(-30, 30);
  12.    	int matrix[h][w];
  13.    	std::cout << "matrix: " << std::endl;
  14.    	for(auto &row : matrix)
  15.    	{
  16.    		for(auto &val : row)
  17.    		{
  18.    			val = distr(gen);
  19.    			std::cout.width(4);
  20.    			std::cout << val;
  21.    		}
  22.    		std::cout << std::endl;
  23.    	}
  24.    	typeof(**matrix) sum = 0;
  25.    	std::cout << "Elements of third column: ";
  26.    	for(size_t idx = 0; idx < h; idx++)
  27.    	{
  28.    		sum += matrix[idx][2];
  29.    		std::cout << matrix[idx][2] << ' ';
  30.    	}
  31.    	std::cout << std::endl;
  32.    	auto max = std::max_element(matrix[1], matrix[1] + w);
  33.    	std::cout << "Max item in line 2: " << *max 
  34.    		<< ", index : " << std::distance(matrix[1], max) << std::endl;
  35.    	std::cout << "Sum of third column: " << sum <<  std::endl;		
  36. 	return 0;
  37. }
Success #stdin #stdout 0s 3460KB
comments (?)
stdin 
Standard input is empty
stdout 
matrix: 
  19 -11   5  10  16 -22   6 -16
 -26 -18  10   5  23 -10 -13 -19
 -13 -25  18  10 -27  19   7 -30
  22   4 -24  29  -4  22  26 -28
  22 -30 -25  30   8  -5   1 -15
Elements of third column: 5 10 18 -24 -25 
Max item in line 2: 23, index : 4
Sum of third column: -16
https://ideone.com/woj6wx
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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