Реферат: Системное программное обеспечение

for (;;)

switch (curr_tok) {

case MUL:

get_token();

left *= prim();

break;

case DIV:

get_token();

double d = prim();

if (d == 0) return error("divide by o");

left /= d;

break;

default:

return left;

}

}

int number_value;

char name_string[80];

double prim()

{

switch (curr_tok) {

case NUMBER:

get_token();

return number_value;

case NAME:

if (get_token() == ASSIGN) {

name* n = insert(name_string);

get_token();

n->value = expr();