#ifndef UTILS_H
#define UTILS_H

// Constant conversion factors.
#define DOLLAR_EURO 0.69     // 1 dollar = 0.69 euro
#define DOLLAR_YEN 116.00    // 1 dollar = 116.00 yen
#define EURO_YEN 166.60      // 1 euro = 166.60 yen

double convert(char, char, double);

#endif