Example: Matrix Addition and Subtraction in C++

// Matrix Addition and Subtraction
#include <iostream>

using namespace std;

// Function to get matrix input from the user
void getMatrixInput(int matrix[][10], int rows, int cols, const char* matrixName) {
    cout << "Enter elements for " << matrixName << " (" << rows << "x" << cols << "):" << endl;
    for (int i = 0; i < rows; ++i) {
        for (int j = 0; j < cols; ++j) {
            cout << "Enter element at [" << i << "][" << j << "]: ";
            cin >> matrix[i][j];
        }
    }
}

// Function to display a matrix
void displayMatrix(int matrix[][10], int rows, int cols, const char* resultType) {
    cout << "\nResulting " << resultType << " Matrix:" << endl;
    for (int i = 0; i < rows; ++i) {
        for (int j = 0; j < cols; ++j) {
            cout << matrix[i][j] << "\t";
        }
        cout << endl;
    }
}

int main() {
    int rows1, cols1, rows2, cols2;
    int matrix1[10][10], matrix2[10][10], sumMatrix[10][10], diffMatrix[10][10];

    // Step 1: Get dimensions for the first matrix
    cout << "Enter number of rows for Matrix 1 (max 10): ";
    cin >> rows1;
    cout << "Enter number of columns for Matrix 1 (max 10): ";
    cin >> cols1;

    // Step 2: Get elements for the first matrix
    getMatrixInput(matrix1, rows1, cols1, "Matrix 1");

    // Step 3: Get dimensions for the second matrix
    cout << "\nEnter number of rows for Matrix 2 (max 10): ";
    cin >> rows2;
    cout << "Enter number of columns for Matrix 2 (max 10): ";
    cin >> cols2;

    // Step 4: Get elements for the second matrix
    getMatrixInput(matrix2, rows2, cols2, "Matrix 2");

    // Step 5: Check compatibility for addition and subtraction
    if (rows1 != rows2 || cols1 != cols2) {
        cout << "\nError: Matrices must have the same dimensions for addition and subtraction." << endl;
        return 1; // Indicate an error
    }

    // Step 6: Perform Matrix Addition
    for (int i = 0; i < rows1; ++i) {
        for (int j = 0; j < cols1; ++j) {
            sumMatrix[i][j] = matrix1[i][j] + matrix2[i][j];
        }
    }
    displayMatrix(sumMatrix, rows1, cols1, "Addition");

    // Step 7: Perform Matrix Subtraction
    for (int i = 0; i < rows1; ++i) {
        for (int j = 0; j < cols1; ++j) {
            diffMatrix[i][j] = matrix1[i][j] - matrix2[i][j];
        }
    }
    displayMatrix(diffMatrix, rows1, cols1, "Subtraction");

    return 0;
}