// 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";
}