// Program: userational2.C
// Add two rational numbers.
#include
#include "rational.C"
int main ()
{
// input
std::cout << "Rational number r:\n";
rational r;
std::cin >> r;
std::cout << "Rational number s:\n";
rational s;
std::cin >> s;
// computation and output
std::cout << "Sum is " << r + s << ".\n";
return 0;
}