Write an algorithm and program for multiplication of a lower triangular matrix with a upper triangular matrix.
Answers
// C++ program to print Lower
// triangular and Upper triangular
// matrix of an array
#include<iostream>
using namespace std;
// Function to form
// lower triangular matrix
void lower(int matrix[3][3], int row, int col)
{
int i, j;
for (i = 0; i < row; i++)
{
for (j = 0; j < col; j++)
{
if (i < j)
{
cout << "0" << " ";
}
else
cout << matrix[i][j] << " ";
}
cout << endl;
}
}
// Function to form upper triangular marix
void upper(int matrix[3][3], int row, int col)
{
int i, j;
for (i = 0; i < row; i++)
{
for (j = 0; j < col; j++)
{
if (i > j)
{
cout << "0" << " ";
}
else
cout << matrix[i][j] << " ";
}
cout << endl;
}
}
// Driver Code
int main()
{
int matrix[3][3] = {{1, 2, 3},
{4, 5, 6},
{7, 8, 9}};
int row = 3, col = 3;
cout << "Lower triangular matrix: \n";
lower(matrix, row, col);
cout << "Upper triangular matrix: \n";
upper(matrix, row, col);
return 0;
}