C++ Programming Code Examples

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C++ Program to Add Two Matrix Using Multi-dimensional Arrays

C++ Program to Add Two Matrix Using Multi-dimensional Arrays

This program takes two matrices of order r*c and stores it in two-dimensional array. Then, the program adds these two matrices and displays it on the screen.

In this program, user is asked to entered the number of rows r and columns c. The value of r and c should be less than 100 in this program.

The user is asked to enter elements of two matrices (of order r*c).

Then, the program adds these two matrices, saves it in another matrix (two-dimensional array) and displays it on the screen.

#include <iostream>
using namespace std;

int main()
{
    int r, c, a[100][100], b[100][100], sum[100][100], x, j;

    cout << "Enter number of rows (between 1 and 100): ";
    cin >> r;

    cout << "Enter number of columns (between 1 and 100): ";
    cin >> c;

    cout << endl << "Enter elements of 1st matrix: " << endl;

    // Storing elements of first matrix entered by user.
    for(x = 0; x < r; ++x)
       for(j = 0; j < c; ++j)
       {
           cout << "Enter element a" << x + 1 << j + 1 << " : ";
           cin >> a[x][j];
       }

    // Storing elements of second matrix entered by user.
    cout << endl << "Enter elements of 2nd matrix: " << endl;
    for(x = 0; x < r; ++x)
       for(j = 0; j < c; ++j)
       {
           cout << "Enter element b" << x + 1 << j + 1 << " : ";
           cin >> b[x][j];
       }

    // Adding Two matrices
    for(x = 0; x < r; ++x)
        for(j = 0; j < c; ++j)
            sum[x][j] = a[x][j] + b[x][j];

    // Displaying the resultant sum matrix.
    cout << endl << "Sum of two matrix is: " << endl;
    for(x = 0; x < r; ++x)
        for(j = 0; j < c; ++j)
        {
            cout << sum[x][j] << "  ";
            if(j == c - 1)
                cout << endl;
        }

    return 0;
}