static void Main(string[] args)
{
CSet setA = new CSet();
CSet setB = new CSet();
setA.Add("milk");
setA.Add("eggs");
setA.Add("bacon");
setA.Add("cereal");
setB.Add("bacon");
setB.Add("eggs");
setB.Add("bread");
CSet setC = new CSet();
setC = setA.Union(setB);
Console.WriteLine();
Console.WriteLine($"A: {setA.ToString()}");
Console.WriteLine($"B: {setB.ToString()}");
Console.WriteLine($"A union B: {setC.ToString()}");
setC = setA.Intersection(setB);
Console.WriteLine($"A intersect B: {setC.ToString()}");
setC = setA.Difference(setB);
Console.WriteLine($"A difference B: {setC.ToString()}");
setC = setB.Difference(setA);
Console.WriteLine($"B difference A: {setC.ToString()}");
if (setB.Subset(setA))
{
Console.WriteLine(" b is a subset of a");
}
else
{
Console.WriteLine(" b is not a subset of a");
}
Console.ReadLine();
}
//差集
public CSet Difference(CSet aSet)
{
CSet tempSet = new CSet();
foreach (var item in data.Keys)
{
if (!aSet.data.Contains(item))
{
tempSet.Add(data[item]);
}
}
return(tempSet);
}
//交集
public CSet Intersection(CSet aSet)
{
CSet tempSet = new CSet();
foreach (var item in data.Keys)
{
if (aSet.data.Contains(item))
{
tempSet.Add(aSet.data[item]);
}
}
return(tempSet);
}
//并集
public CSet Union(CSet aset)
{
CSet tempSet = new CSet();
foreach (var item in data.Keys)
{
tempSet.Add(this.data[item]);
}
foreach (var item in aset.data.Keys)
{
if (!this.data.ContainsKey(item))
{
tempSet.Add(aset.data[item]);
}
}
return(tempSet);
}
//子集
public bool Subset(CSet aSet)
{
if (this.Size() > aSet.Size())
{
return(false);
}
else
{
foreach (var item in this.data.Keys)
{
if (!aSet.data.Contains(item))
{
return(false);
}
}
}
return(true);
}
