Expr* factor(const char* string, Expr* expr) {
if(string[VAL_STRING] == '(') {
expr->op = eat_char(string, '(');
expr->data.expr[0] = parse(string);
eat_char(string, ')');
} else if(isdigit(string[VAL_STRING])) {
expr->op = 'd';
expr->data.terminal = eat_int(string);
}
return expr;
}
int main(int argc, char ** argv){
tokenizer_t t = mk_tokenizer(argv[1]);
while(cur_tok(t).kind != tok_eof){
if(cur_tok(t).kind == tok_nl){
t->num = 0;
next_tok(t);
}
else{
int x = eat_int(t);
while(cur_tok(t).kind != tok_nl){
eat_plus(t);
int y = eat_int(t);
x = x + y;
}
t->num = 0;
next_tok(t);
printf("sum = %d\n", x);
}
}
return 0;
}