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Answer to Question #24630 in C++ for patrick asare

Question #24630
QUESTION: "write a C++ program for the matrix of integers to swap the first row and row
containing the largest element in absolute value".
matrix.

Expert's answer
#include <cmath>
#include <ctime>
#include <cstdlib>
#include <iomanip>
#include <iostream>

#include <conio.h>

using namespace std;

const int MATRIX_SIZE = 5;

void print_matrix(int (&matrix)[MATRIX_SIZE][MATRIX_SIZE])
{
for (int x = 0; x < MATRIX_SIZE; x++)
{
for (int y = 0; y < MATRIX_SIZE; y++)
cout << setw(4) << matrix[x][y];
cout << endl;
}
cout << endl;
}

int find_max_element_row(int (&matrix)[MATRIX_SIZE][MATRIX_SIZE])
{
int row = 0;
int maxElement = -1;

for (int x = 0; x < MATRIX_SIZE; x++)
for (int y = 0; y < MATRIX_SIZE; y++)
if (abs(matrix[x][y]) > maxElement)
{
maxElement = abs(matrix[x][y]);
row = x;
}
return row;
}

void swap_rows(int (&matrix)[MATRIX_SIZE][MATRIX_SIZE], int rowA, int rowB)
{
int tmp;
for (int y = 0; y < MATRIX_SIZE; y++)
{
tmp = matrix[rowA][y];
matrix[rowA][y] = matrix[rowB][y];
matrix[rowB][y] = tmp;
}
}

int main()
{
int matrix[5][5];

srand(time(NULL));
for (int x = 0; x < MATRIX_SIZE; x++)
for (int y = 0; y < MATRIX_SIZE; y++)
matrix[x][y] = rand() % 30;

cout << "The initial matrix:" << endl;
print_matrix(matrix);

swap_rows(matrix, find_max_element_row(matrix), 0);

cout << "The resulting matrix:" << endl;
print_matrix(matrix);

_getch();
return 0;
}

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