Реферат: Системное программное обеспечение

}

return look(name_string)->value;

case MINUS:

get_token();

return -prim();

case LP:

get_token();

double e = expr();

if (curr_tok != RP) return error(") expected");

get_token();

return e;

case END:

return 1;

default:

return error ("primary expected");

}

}

token_value get_token()

{

char ch = 0;

do {

if(!cin.get(ch)) return curr_tok = END;

} while (ch!='\n' && isspace(ch));

switch (ch) {

case ';':

case '\n':

cin >> WS;

return curr_tok=PRINT;

case '*':