With and without it, trying to compile this: long a = 10; int b = 20; printf("mi...

With and without it, trying to compile this:

    long a = 10;
    int b = 20;
    printf("min is %ld\n", min(a, b));

With, it generates a warning:

    davidw@fortrock:/tmp$ gcc -o min min.c
    min.c: In function ‘main’:
    min.c:13: warning: comparison of distinct pointer types lacks a cast

Without, there is no warning.