int main(void) {
Rational<double> oneFourth(1, 4);
Rational<double> result;
result = oneFourth * 3.5;
result = 3.5 * oneFourth;
std::cout << "result = " << result.value() << std::endl;
return 0;
}
int main(int argc, char * argv[]) {
if (argc != 2) {
throw std::invalid_argument("usage: sqrt2 prec");
} else {
const std::regex r("[0-9]*");
if (std::regex_match(argv[1], r)) {
int n = atoi(std::string(argv[1]).c_str());
if (n < 1) {
throw std::invalid_argument("argument must be integer larger than zero");
} else {
Rational approx = 1 + approximate(n-1);
std::cout << approx << " ~ " << approx.value() << "\n";
}
} else {
throw std::invalid_argument("argument must be integer larger than zero");
}
}
}
