Largest Element in Diagonal Matrix in C++

 Machine Problem in C++

// Write a program to find the largest element of the main diagonal 

// for an integer matrix: A(4.4) 

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Program Listing

// Write a program to find the largest element of the main diagonal 
// for an integer matrix: A(4.4) 

#include <iostream>

using Matrix = int[4][4];

[[nodiscard]] int max_elem(const Matrix& m)
{
	int max = m[0][0];
	for (int row = 1, col = 1; row < 4 && col < 4; ++row, ++col)
		if (m[row][col] > max)
			max = m[row][col];

	return max;
}

int main()
{
	Matrix matrix =
	{
		{ 1, 2, 3, 4 },
		{ 5, 6, 7, 8 },
		{ 9, 10, 11, 12 },
		{ 13, 14, 15, 16 }
	};

	std::cout << "Max elem: " << max_elem(matrix) << "\n";
}