public static Set operator +(Set ob, char ch)
{
if(ob.find(ch) != -1)
{
return new Set(ob);
}
else
{
Set newset = new Set(ob.Length + 1);
for(int i = 0; i < ob.Length; i++)
newset.members[i] = ob.members[i];
newset.Length = ob.Length + 1;
newset.members[newset.Length - 1] = ch;
return newset;
}
}
public static Set operator +(Set ob1, Set ob2)
{
Set newset = new Set(ob1);
for(int i =0; i < ob2.Length; i++)
newset = newset + ob2[i];
return newset;
}
public static Set operator -(Set ob, char ch)
{
Set newset = new Set();
int i = ob.find(ch);
for(int j =0; j < ob.Length; j++)
if(j != i) newset = newset + ob.members[j];
return newset;
}
public Set(Set s)
{
members = new char[s.Length];
for(int i=0; i < s.Length; i++) members[i] = s.members[i];
Length = s.Length;
}
public static void SetDemoStart()
{
Set s1 = new Set();
Set s2 = new Set();
Set s3 = new Set();
s1 = s1 + 'A';
s1 = s1 + 'B';
s1 = s1 + 'C';
Console.Write("s1 after adding A B C: ");
for(int i=0; i<s1.Length; i++)
Console.Write(s1[i] + " ");
Console.WriteLine();
s1 = s1 - 'B';
Console.Write("s1 after s1 = s1 - 'B': ");
for(int i=0; i<s1.Length; i++)
Console.Write(s1[i] + " ");
Console.WriteLine();
s1 = s1 - 'A';
Console.Write("s1 after s1 = s1 - 'A': ");
for(int i=0; i<s1.Length; i++)
Console.Write(s1[i] + " ");
Console.WriteLine();
s1 = s1 - 'C';
Console.Write("s1 after s1 = s1 - 'C': ");
for(int i=0; i<s1.Length; i++)
Console.Write(s1[i] + " ");
Console.WriteLine("\n");
s1 = s1 + 'A';
s1 = s1 + 'B';
s1 = s1 + 'C';
Console.Write("s1 after adding A B C: ");
for(int i=0; i<s1.Length; i++)
Console.Write(s1[i] + " ");
Console.WriteLine();
s2 = s2 + 'A';
s2 = s2 + 'X';
s2 = s2 + 'W';
Console.Write("s2 after adding A X W: ");
for(int i=0; i<s2.Length; i++)
Console.Write(s2[i] + " ");
Console.WriteLine();
s3 = s1 + s2;
Console.Write("s3 after s3 = s1 + s2: ");
for(int i=0; i<s3.Length; i++)
Console.Write(s3[i] + " ");
Console.WriteLine();
s3 = s3 - s1;
Console.Write("s3 after s3 - s1: ");
for(int i=0; i<s3.Length; i++)
Console.Write(s3[i] + " ");
Console.WriteLine("\n");
Console.WriteLine();
s2 = s2 - s2;
s2 = s2 + 'C';
s2 = s2 + 'B';
s2 = s2 + 'A';
s1 = s1 + 'D';
s1 = s1 + 'E';
s2 = s2 + 'E';
Console.Write("s1 is now: ");
for(int i=0; i<s1.Length; i++)
Console.Write(s1[i] + " ");
Console.WriteLine();
Console.Write("s2 is now: ");
for(int i=0; i<s2.Length; i++)
Console.Write(s2[i] + " ");
Console.WriteLine();
Console.Write("s3 is now: ");
for(int i=0; i<s3.Length; i++)
Console.Write(s3[i] + " ");
Console.WriteLine();
Console.WriteLine();
}