Example: Matrix Row and Column Sum in C

// Matrix Row and Column Sum
#include <stdio.h>

#define ROWS 3
#define COLS 3

int main() {
    int matrix[ROWS][COLS] = {
        {1, 2, 3},
        {4, 5, 6},
        {7, 8, 9}
    };
    int i, j;
    int row_sum, col_sum;

    printf("Original Matrix:\n");
    for (i = 0; i < ROWS; i++) {
        for (j = 0; j < COLS; j++) {
            printf("%d\t", matrix[i][j]);
        }
        printf("\n");
    }
    printf("\n");

    // Step 1: Calculate sum of each row
    printf("Row Sums:\n");
    for (i = 0; i < ROWS; i++) {
        row_sum = 0; // Reset sum for each new row
        for (j = 0; j < COLS; j++) {
            row_sum += matrix[i][j];
        }
        printf("Sum of Row %d = %d\n", i + 1, row_sum);
    }
    printf("\n");

    // Step 2: Calculate sum of each column
    printf("Column Sums:\n");
    for (j = 0; j < COLS; j++) { // Outer loop iterates through columns
        col_sum = 0; // Reset sum for each new column
        for (i = 0; i < ROWS; i++) { // Inner loop iterates through rows
            col_sum += matrix[i][j];
        }
        printf("Sum of Column %d = %d\n", j + 1, col_sum);
    }

    return 0;
}