astronomical-units.cpp

#include <iostream>

#define ASTRO_UNITS_PER_LIGHT_YEAR 63240
float lightYearsToAstronomicalUnits(float);

int main()
{
  using namespace std;
  cout << "Enter the number of light years: ";
  float lightYears;
  cin >> lightYears;
  cout << lightYears << " light years = "
       << lightYearsToAstronomicalUnits(lightYears)
       << " astronomical units." << endl;
  return 0;
}

float lightYearsToAstronomicalUnits(float lightYears)
{
  return lightYears * ASTRO_UNITS_PER_LIGHT_YEAR;
}