Write a program to exchange the contents of data segment memory locations (DS:130H ,DS: 131H) and (DS:13AH,DS:13BH)

id swap(unsigned char *a, unsigned char *b)
{
    unsigned char temp;
    temp = *a;
    *a = *b;
    *b = temp;
}

int main()
{
    unsigned char a = 1;
    unsigned char b = 2;
    swap(&a, &b);
    printf("%d\n", a);
    printf("%d\n", b);
    return 0;