Example: Matrix Addition in C

// Matrix Addition
#include <stdio.h>

int main() {
    int rows, cols;

    // Step 1: Get matrix dimensions from the user
    printf("Enter the number of rows: ");
    scanf("%d", &rows);
    printf("Enter the number of columns: ");
    scanf("%d", &cols);

    // Step 2: Declare two matrices and a result matrix
    // Using variable length arrays (VLA) available in C99,
    // otherwise, fixed-size arrays or dynamic allocation would be needed.
    int matrix1[rows][cols];
    int matrix2[rows][cols];
    int sumMatrix[rows][cols];

    // Step 3: Input elements for the first matrix
    printf("\nEnter elements of first matrix:\n");
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            printf("Enter element matrix1[%d][%d]: ", i, j);
            scanf("%d", &matrix1[i][j]);
        }
    }

    // Step 4: Input elements for the second matrix
    printf("\nEnter elements of second matrix:\n");
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            printf("Enter element matrix2[%d][%d]: ", i, j);
            scanf("%d", &matrix2[i][j]);
        }
    }

    // Step 5: Perform matrix addition
    printf("\nPerforming Matrix Addition...\n");
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            sumMatrix[i][j] = matrix1[i][j] + matrix2[i][j];
        }
    }

    // Step 6: Display the sum matrix
    printf("\nSum of the two matrices:\n");
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            printf("%d\t", sumMatrix[i][j]);
        }
        printf("\n"); // Move to the next line after each row
    }

    return 0;
}