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

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.

Example: Add Two Matrices using Multi-dimensional Arrays

 #include <iostream> using namespace std; int main() { int r, c, a[100][100], b[100][100], sum[100][100], i, 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(i = 0; i < r; ++i) for(j = 0; j < c; ++j) { cout << "Enter element a" << i + 1 << j + 1 << " : "; cin >> a[i][j]; } // Storing elements of second matrix entered by user. cout << endl << "Enter elements of 2nd matrix: " << endl; for(i = 0; i < r; ++i) for(j = 0; j < c; ++j) { cout << "Enter element b" << i + 1 << j + 1 << " : "; cin >> b[i][j]; } // Adding Two matrices for(i = 0; i < r; ++i) for(j = 0; j < c; ++j) sum[i][j] = a[i][j] + b[i][j]; // Displaying the resultant sum matrix. cout << endl << "Sum of two matrix is: " << endl; for(i = 0; i < r; ++i) for(j = 0; j < c; ++j) { cout << sum[i][j] << " "; if(j == c - 1) cout << endl; } return 0; }

Output

 Enter number of rows (between 1 and 100): 2 Enter number of columns (between 1 and 100): 2 Enter elements of 1st matrix: Enter element a11: -4 Enter element a12: 5 Enter element a21: 6 Enter element a22: 8 Enter elements of 2nd matrix: Enter element b11: 3 Enter element b12: -9 Enter element b21: 7 Enter element b22: 2 Sum of two matrix is: -1 -4 13 10

Also Read:

• C++ Program to Multiply Two Matrix Using Multi-dimensional Arrays