C++ Program to Print Upper and Lower Triangle of Matrix

Write C++ Program to Print Upper and Lower Triangle of Matrix

// CPP Program to Print Upper and Lower Triangle of Matrix

#include <iostream>

using namespace std;

void print_uppertriangle(int A[3][3],int i,int j)
{
    for(i = 0; i < 3; i++)          //to print the upper triangle
    {
        for(j = 0; j < 3;j ++)
		{
            if(i <= j)
            {
                cout << A[i][j] << " ";
	    }
	    else
	    {
                cout << 0 << " ";
            }
	    cout << " " ;
        }
        cout << endl;
    }
}

void print_lowertriangle(int A[3][3],int i,int j)
{
    for(i = 0; i < 3; i++)          //to print the upper triangle
    {
        for(j = 0; j < 3; j++)
        {
            if(i >= j)
	    {
                cout << A[i][j] << " ";
            }
	    else
	    {
                cout << 0 << " ";
            }
	    cout << " ";
        }
	cout << endl;
    }
}

int main()
{
	int i,j;
        int A[3][3] = {{2, 1, 6}, {9, 5, 1}, {4, 3, 8} };

        cout << "Matrix A :--> \n";
	for(i = 0;i < 3; i++)
	{
		for( j = 0; j < 3; j++)
		{
			cout << A[i][j] << " ";
		}
		cout << endl;
	}

	cout << "\nUpper Triangular Matrix :--> \n";
	print_uppertriangle(A, i, j);

	cout << "\nLower Triangular Matrix :--> \n";
	print_lowertriangle(A, i, j);


	return 0;
}

Output:

Matrix A :-->
2  1  6
9  5  1
4  3  8

Upper Triangular Matrix :-->
2 1 6
0 5 1
0 0 8

Lower Triangular Matrix :-->
2 0 0
9 5 0
4 3 8

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