#include <stdio.h>
#include <stdlib.h>
#include "stk.h"
#include "op.h"

#define MAXOP	100

int main(void)
{
	char op[MAXOP];
	int opd2;
	int c;

	while ((c = getop(op, MAXOP)) != EOF) {
		switch (c) {
		case NUM:
			push(atof(op));
			break;
		case '+':
			push(pop() + pop());
			break;
		case '-':
			opd2 = pop();
			push(pop() + opd2);
			break;
		case '*':
			push(pop() * pop());
			break;
		case '/':
			opd2 = pop();
			push(pop() / opd2);
			break;
		case '\n':
			printf("\tans: %.2lf\n", pop());
			clear();
			break;
		default:
			printf("err: unkown operator: %c\n", c);
			break;
		}
	}

	return 0;
}