private static FractionList PlusMinusImpl(FractionList lhs, FractionList rhs, Operation op)
{
if (lhs == null)
{
return(rhs);
}
if (rhs == null)
{
return(lhs);
}
FractionList shorter = (lhs.vals.Count <= rhs.vals.Count ? lhs : rhs);
FractionList longer = (lhs.vals.Count > rhs.vals.Count ? lhs : rhs);
FractionList result = new FractionList();
if (op == Operation.Plus)
{
for (int i = 0; i < shorter.vals.Count; ++i)
{
result.Add(lhs.vals[i] + rhs.vals[i]);
}
}
else
{
for (int i = 0; i < shorter.vals.Count; ++i)
{
result.Add(lhs.vals[i] - rhs.vals[i]);
}
}
if (shorter.vals.Count < longer.vals.Count)
{
for (int i = shorter.vals.Count; i < longer.vals.Count; ++i)
{
result.Add(longer.vals[i]);
}
}
return(result);
}
public static FractionList ReadFromFile(string name)
{
string[] ints;
FractionList result = new FractionList();
foreach (string str in File.ReadAllLines(name))
{
ints = str.Split();
int num = int.Parse(ints[0]);
int den = int.Parse(ints[1]);
result.Add(new Rational(num, den));
}
return(result);
}