Typical generic applications

This exampleProgramThe function is to find the maximum and minimum values in the array.

First, define a generic structure pair to save this value:

 
Public StructPair <t>
{
PublicT max;
PublicT min;
}
 

 

Next, design a generic maxmin class, and provide a public getmaxminvaulefromarray method to encapsulate "find the maximum and minimum values in the array ".Algorithm.

 Public   Class Maxmin <t> Where T: icomparable <t>
{
 //  Process data and obtain the maximum and minimum values  
 Public   Static Pair <t> getmaxminvaulefromarray (T [] ARR)
{
Pair <t> ret;
Ret. max = arr [ 0 ];
Ret. min = arr [ 0 ];
 For ( Int I = 1 ; I <= arr. getupperbound ( 0 ); I ++)
{
 If (Ret. Max. compareto (ARR [I]) <0 )
Ret. max = arr [I];
 If (Ret. Min. compareto (ARR [I])> 0 )
Ret. min = arr [I];
}
 Return RET;
}
}

To compare the elements of a generic array, the type parameter T is required to implement the icomparable <t> generic interface.

The int and Char Types in C # both implement the icomparable <t> generic interface, so it can be used directly. However, the complex complecnum class is written by ourselves and must be written.CodeEnable the icomparblae <complexnum> interface.

 

 

     Class Complexnum: icomparable <complexnum>
{
 Public   Double A; //  Real-time  
          Public   Double B; //  Virtual part  
 
 Public Complexnum ( Double Avalue, Double Bvalue)
{
A = avalue;
B = bvalue;
}
 //  Returns a string in the form of a + bi according to the plural value.  
          Public   Override String tostring ()
{
 Return (A. tostring () + "  +  " + B. tostring () + "  I  " );
}
 //  Evaluate the modulo of the plural number  
          Public   Double Getmod ()
{
 Return Math. SQRT (A * A + B * B );
}
 //  Compare the sizes of two plural numbers by modulo  
          Int Icomparable <complexnum>. compareto (complexnum other)
{
 If (Math. Abs (getmod ()-Other. getmod () < 0.000001 )
 Return   0 ;
 If (Getmod ()> other. getmod ())
 Return   1 ;
 Else 
 Return - 1 ;
}
}

 

 

Now the complexnum object can be compared to the size. The following sample code finds the largest and smallest plural numbers in the plural array.

 

     Public   Partial   Class Frmgpexample: Form
{
 Public Frmgpexample ()
{
Initializecomponent ();
}

 Private   Char [] Chararray = New   Char [ 10 ];
 Private  Int [] Intarray = New   Int [ 10 ];
 Private Complexnum [] complexarray = New Complexnum [ 10 ];

 Private    Void Onbuttonclick ()
{
 //  Fill Array  
 Fillarray ();
 If (Rdointeger. Checked)
Showresult < Int > (Maxmin < Int >. Getmaxminvaulefromarray (intarray ));

 If (Rdochar. Checked)
Showresult < Char > (Maxmin < Char >. Getmaxminvaulefromarray (chararray ));

 If (Rdocomplex. Checked)
Showresult <complexnum> (maxmin <complexnum>. getmaxminvaulefromarray (complexarray ));

}

 Private   Void Showresult <t> (pair <t> RET)
{
Lblmax. Text = "  Maximum value:  " + Ret. Max. tostring ();
Lblmin. Text = "  Minimum value:  " + Ret. Min. tostring ();
}

 //  Fill the array with random data and display it in the list box  
      Private   Void Fillarray ()
{

 Int I;
Random ran = New Random ();
Lstdata. Items. Clear ();
 If (Rdointeger. Checked)
 For (I = 0 ; I <= intarray. getupperbound ( 0 ); I ++)
{
Intarray [I] = ran. Next ( 0 , 100 );
Lstdata. Items. Add (intarray [I]);
}
 If (Rdochar. Checked)
 For (I = 0 ; I <= chararray. getupperbound ( 0 ); I ++)
{
 Int Charcode;
Charcode = ran. Next ( 0 , 26 );
Chararray [I] = ( Char )( '  A  ' + Charcode );
Lstdata. Items. Add (chararray [I]. tostring () + "  : ASC code value =  " + (( Int ) Chararray [I]). tostring ());

}

 Int A, B;

 If (Rdocomplex. Checked)
 For (I = 0 ; I <= complexarray. getupperbound ( 0 ); I ++)
{
A = ran. Next ( 0 , 10 );
B = ran. Next ( 0 , 10 );
Complexarray [I] = New Complexnum (A, B );
Lstdata. Items. Add (complexarray [I]. tostring () + "  Modulo =  " + Complexarray [I]. getmod (). tostring ());

}
}

 Private   Void Btnfillarray_click ( Object Sender, eventargs E)
{
Onbuttonclick (); // Generic version  
 }

 Private   Void Btnexit_click ( Object Sender, eventargs E)
{
Application. Exit ();
}
}