学用ASP.NetのSystemCollections.BitArrayクラス

/*    */

Count    //  

Length   //  Count,     



/*    */

And()    // 

Get()    //  

Not()    //  

Or()     // 

Set()    //  

SetAll() //        

Xor()    //  

//(items)[]、Get()、Set()

protected void Button1_Click(object sender, EventArgs e)

{

    BitArray bits = new BitArray(new bool[3] { true, false, true });



    bool b1 = bits[0];       //True

    bool b2 = bits[1];       //False

    //bool b1 = bits.Get(0);

    //bool b2 = bits.Get(1);

    

    bits[0] = false;

    bits[1] = true;

    //bits.Set(0, false);

    //bits.Set(1, true);



    bool b11 = bits[0]; //False

    bool b22 = bits[1]; //True



    TextBox1.Text = string.Concat(b1, "<br>", b2, "<br>", b11, "<br>", b22);

} 



//SetAll()    

protected void Button2_Click(object sender, EventArgs e)

{

    BitArray bits = new BitArray(5);



    string str1 = "";

    foreach (bool b in bits)

    {

        str1 += b.ToString() + " "; //False False False False False 

    }



    bits.SetAll(true);

    string str2 = "";

    foreach (bool b in bits)

    {

        str2 += b.ToString() + " "; //True True True True True 

    }

    TextBox1.Text = str1 + "<br>" + str2;

}



//Count、Length

protected void Button3_Click(object sender, EventArgs e)

{

    BitArray bits = new BitArray(5);



    int n1 = bits.Count; //5



    bits.Length = 3;

    int n2 = bits.Count; //3



    TextBox1.Text = string.Concat(n1, "<br>", n2);

}



//Not()

protected void Button4_Click(object sender, EventArgs e)

{

    BitArray bits = new BitArray(new bool[4] { true, false, true, false });

    bits.Not();                             // False,True,  False,True

    TextBox1.Text = string.Format("{0},{1},{2},{3}", bits[0], bits[1], bits[2], bits[3]);

}



//And()

protected void Button5_Click(object sender, EventArgs e)

{

    BitArray bits1 = new BitArray(new bool[4] { true, false, true,  false });

    BitArray bits2 = new BitArray(new bool[4] { true, true,  false, false });



    bits1.And(bits2);                        // True, False, False, False

    TextBox1.Text = string.Format("{0},{1},{2},{3}", bits1[0], bits1[1], bits1[2], bits1[3]);

}



//Or()

protected void Button6_Click(object sender, EventArgs e)

{

    BitArray bits1 = new BitArray(new bool[4] { true, false, true,  false });

    BitArray bits2 = new BitArray(new bool[4] { true, true,  false, false });



    bits1.Or(bits2);                        // True,  True,  True,   False

    TextBox1.Text = string.Format("{0},{1},{2},{3}", bits1[0], bits1[1], bits1[2], bits1[3]);

}



//Xor()

protected void Button7_Click(object sender, EventArgs e)

{

    BitArray bits1 = new BitArray(new bool[4] { true, false, true,  false });

    BitArray bits2 = new BitArray(new bool[4] { true, true,  false, false });



    bits1.Xor(bits2);                        // False,True,  True,  False

    TextBox1.Text = string.Format("{0},{1},{2},{3}", bits1[0], bits1[1], bits1[2], bits1[3]);

}



//      

protected void Button8_Click(object sender, EventArgs e)

{

    //     3   true

    BitArray bits1 = new BitArray(3, true);



    //  byte[]     ,       byte   8            

    BitArray bits2 = new BitArray(new byte[3] { byte.MaxValue, byte.MinValue, byte.MaxValue });



    //  int[]     ,       int   32            

    BitArray bits3 = new BitArray(new int[3] { int.MaxValue, int.MinValue, int.MaxValue });



    int n1 = bits1.Length; //3

    int n2 = bits2.Length; //24

    int n3 = bits3.Length; //96



    string s1, s2, s3;

    s1 = s2 = s3 = "";



    foreach (bool b in bits1) { s1 = string.Concat(s1, Convert.ToByte(b)); } //111



    foreach (bool b in bits2) { s2 = string.Concat(s2, Convert.ToByte(b)); } //11111111

                                                                             //00000000

                                                                             //11111111



    foreach (bool b in bits3) { s3 = string.Concat(s3, Convert.ToByte(b)); } //11111111111111111111111111111110

                                                                             //00000000000000000000000000000001

                                                                             //11111111111111111111111111111110

    TextBox1.Text = string.Concat(n1, "<br>", n2, "<br>", n3, "<br>", s1, "<br>", s2, "<br>", s3);

}