In this tutorial, we will write a C++ program to add two matrices using multi-dimensional arrays. To understand the coding, you should have knowledge of the following topics in C++ programming:
The program takes the user input for the number of rows and columns then the elements for both the matrices.
Lastly, add both the matrices and store them in a separate array and display the result. Let us go through the program.
C++ Program to Add Two Matrices
During addition or subtraction of matrix, it is important that both of the matrices have the same dimensions such as 2×3 matrix can be added to 2×3 matrix.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | #include <iostream> using namespace std; int main() { int arr1[50][50], arr2[50][50], sum[50][50]; int row, col, i, j; cout << "Enter the no. of rows: "; cin >> row; cout << "Enter the no. of columns: "; cin >> col; // 1st matrix user input cout << endl << "Enter 1st Matrix elements: " << endl; for (i = 0; i < row; ++i) for (j = 0; j < col; ++j) cin >> arr1[i][j]; // 2nd matrix user input cout << endl << "Enter 2nd Matrix elements: " << endl; for (i = 0; i < row; ++i) for (j = 0; j < col; ++j) cin >> arr2[i][j]; // matrix adition for (i = 0; i < row; ++i) for (j = 0; j < col; ++j) sum[i][j] = arr1[i][j] + arr2[i][j]; // Displaying the result cout << endl << "Result of sum of the matrices: " << endl; for (i = 0; i < row; ++i) for (j = 0; j < col; ++j) { cout << sum[i][j] << " "; if (j == col - 1) cout << endl; } return 0; } |
Output:
Enter the no. of rows: 2
Enter the no. of columns: 3
Enter 1st Matrix elements:
2
2
2
2
2
2
Enter 2nd Matrix elements:
3
3
3
3
3
3
Result of sum of the matrices:
5 5 5
5 5 5