Реферат: Системное программное обеспечение

NAME, NUMBER, END,

PLUS = '+', MINUS = '-', MUL='*', DIV='/',

PRINT=';', ASSIGN='=', LP='(', RP=')'

};

token_value curr_tok;

struct name {

char* string;

name* next;

double value;

};

const TBLSZ = 23;

name* table[TBLSZ];

int no_of_errors;

double error(char* s) {

cerr << "error: " << s << "\n";

no_of_errors++;

return 1;

}

name* look(char* p, int ins = 0)

{

int ii= 0;

char *pp = p;

while (*pp) ii = ii<<1 ^ *pp++;

if (ii < 0) ii = -ii;

ii %= TBLSZ;

for (name* n=table [ii]; n; n=n->next)

if (strcmp(p,n->string) == 0) return n;

if (ins == 0) error("name not found");

name* nn = new name;