Question

How to clone a two-dimensional array in C

Answer 1

#include <stdio.h>
#include <stdlib.h>

#define ROWS 3
#define COLS 4

void clone2DArray(int rows, int cols, int arr2D[][COLS], int clone[][COLS]) {
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            clone[i][j] = arr2D[i][j];
        }
    }
}

int main() {
    int arr2D[][COLS] = {
        {1, 2, 3, 0},
        {4, 5, 6, 11},
        {7, 8, 9, 38}
    };
    
    int rows = sizeof arr2D / sizeof arr2D[0];
    int cols = sizeof arr2D[0] / sizeof(int);

    int clone[ROWS][COLS];

    clone2DArray(rows, cols, arr2D, clone);

    printf("Cloned Array:\n");
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            printf("%d ", clone[i][j]);
        }
        printf("\n");
    }

    return 0;
}


/*
run:

Cloned Array:
1 2 3 0 
4 5 6 11 
7 8 9 38 

*/

 

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