1. /* Print an "lval" */
    2. void lval_print(lval v) {
    3.   switch (v.type) {
    5.     /* Then 'break' out of the switch. */
    6.     case LVAL_NUM: printf("%li", v.num); break;
    8.     case LVAL_ERR:
    9.       /* Check what type of error it is and print it */
    10.       if (v.err == LERR_DIV_ZERO) {
    11.         printf("Error: Division By Zero!");
    12.       }
    13.       if (v.err == LERR_BAD_OP)   {
    15.       if (v.err == LERR_BAD_NUM)  {
    16.         printf("Error: Invalid Number!");
    17.       }
    18.     break;
    19.   }
    20. }
    22. void lval_println(lval v) { lval_print(v); putchar('\n'); }