
    maxn(2, 3, 5);              /* returns 5, as would max(3,5)            */ 
    maxn(5, 3, 5, 7, 11, 13)    /* returns 13, largest of the 5 values.    */ 
    maxn(3, 3, 5, 7, 11, 13)    /* returns 7, largest of first 3 values.   */ 
    maxn(1, 17);                /* also works with fewer than two values.  */ 


