Example: Check Specific Column for All 0s in C

// Check Specific Column for All 0s
#include <stdio.h>
#include <stdbool.h>

#define ROWS 3
#define COLS 4

// Function to check if a specific column has all 0s
bool checkColForAllZeros(int matrix[ROWS][COLS], int col_index) {
    if (col_index < 0 || col_index >= COLS) {
        printf("Error: Invalid column index.\n");
        return false;
    }
    for (int i = 0; i < ROWS; i++) { // Iterate through rows for a fixed column
        if (matrix[i][col_index] == 1) {
            return false; // Found a 1, so not all 0s
        }
    }
    return true; // All elements were 0s
}

int main() {
    // Step 1: Define a sample boolean matrix
    int booleanMatrix[ROWS][COLS] = {
        {1, 0, 1, 0},
        {0, 0, 0, 0},
        {1, 0, 1, 0}
    };

    // Step 2: Print the matrix
    printf("Matrix:\n");
    for (int i = 0; i < ROWS; i++) {
        for (int j = 0; j < COLS; j++) {
            printf("%d ", booleanMatrix[i][j]);
        }
        printf("\n");
    }

    // Step 3: Check a specific column (e.g., column 1)
    int targetCol = 1;
    if (checkColForAllZeros(booleanMatrix, targetCol)) {
        printf("Column %d has all 0s.\n", targetCol);
    } else {
        printf("Column %d does not have all 0s.\n", targetCol);
    }

    // Step 4: Check another column (e.g., column 2)
    targetCol = 2;
    if (checkColForAllZeros(booleanMatrix, targetCol)) {
        printf("Column %d has all 0s.\n", targetCol);
    } else {
        printf("Column %d does not have all 0s.\n", targetCol);
    }

    return 0;
}