C program to swap two arrays using pointers

Write a C program to swap two arrays using pointers.

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

  /* swaps two arrays using pointers */
  void swapTwoArrays(int *arr1, int *arr2, int n) {
        int i, temp;

        for (i = 0; i < n; i++) {
                temp = *(arr1 + i);
                *(arr1 + i) = *(arr2 + i);
                *(arr2 + i) = temp;
        }
        return;
  }

  int main() {
        int *arr1, *arr2, i, j, n;

        /* get the order of the arrays from the user */
        printf("Enter the order of the arrays:");
        scanf("%d", &n);

        /* dynamically allocate memory to store elements */
        arr1 = (int *) malloc(sizeof(int) * n);
        arr2 = (int *) malloc(sizeof(int) * n);

        /* input elements for first array */
        printf("Enter data for first array:\n");
        for (i = 0; i < n; i++) {
                printf("Array1[%d] : ", i);
                scanf("%d", (arr1 + i));
        }

        /* input elements for second array */
        printf("Enter data for second array:\n");
        for (i = 0; i < n; i++) {
                printf("Array2[%d] :", i);
                scanf("%d", arr2 + i);
        }

        /* swap the elements in the given arrays */
        swapTwoArrays(arr1, arr2, n);

        /* print the elements in the first array */
        printf("Elements in first array:\n");
        for (i = 0; i < n; i++) {
                printf("%d ", *(arr1 + i));
        }
        printf("\n");

        /* print the elements in the second array */
        printf("Elements in second array:\n");
        for (i = 0; i < n; i++) {
                printf("%d ", *(arr2 + i));
        }
        printf("\n");
        return 0;
  }

  Output:

  jp@jp-VirtualBox:~/$ ./a.out
  Enter the order of the arrays:4
  Enter data for first array:
  Array1[0] : 10
  Array1[1] : 20
  Array1[2] : 30
  Array1[3] : 40

  Enter data for second array:
  Array2[0] :110
  Array2[1] :120
  Array2[2] :130
  Array2[3] :140

  Elements in first array:
  110 120 130 140 

  Elements in second array:
  10 20 30 40