Variable Parameter usage (C ++ and C)

// Variable Parameter usage in C ++
# Include <stdio. h>
# Include <stdarg. h>

Int Openfilearray ( File *** Array , Char * Mode , Char * Filename , ...)
{
Char * Pname= Null ;
Int Nrfiles = 0 ;
Int Arrayindex = 0 ;
If ( Filename = Null ) {
Return 0 ;
}
// Create an index using typedef In the parameter table
Va_listlistindex ;
// Initialize the macro of the first parameter index in the parameter table
Va_start ( Listindex , Filename );

Do{
Nrfiles++;
// Obtain the macro of the next parameter in the parameter table
Pname=Va_arg(Listindex,Char*);
}While(Pname! =Null);

*Array=NewFile*[Nrfiles+1];

// Open files
Pname = Filename ;
Va_start ( Listindex , Filename );
Do {
If (! ((* Array )[ Arrayindex ++] = Fopen ( Pname , Mode ))) {
(* Array )[ Arrayindex - 1 ] = Null ;
Return 0 ;
}
Printf ( "Had open file: % s \ n" , Pname );
Pname = Va_arg ( Listindex , Char *);
} While ( Pname ! = Null); // There is a problem

(*Array)[Arrayindex]=Null;

Return1;
}

Void Main ( Void )
{
File ** Array ;
Int Fp = Openfilearray (& Array , "R" , "1.txt" , "2.txt" , "3.txt" );

If ( Fp = 1 ) {
Printf ( "\ Nopen file successfully! \ N" );
}
// Close the files
Int I = 0 ;
While ( Array [ I ] ! = Null ) {
Fclose ( Array [ I ++]);
}
Delete [] Array ;
}
// Use variable parameters in C #
// If you do not need the Params keyword, you need to use new object [] {arg1, arg2} when calling the parameter}
Class Program
{
Public Static Int Sumwithvariableparams ( Params Int [] ARGs )
{
Int Sum = 0 ;
For ( Int I = 0 ; I < ARGs . Length ; I ++)
{
Sum + = ARGs [ I ];
}
Return Sum ;
}
Static Void Main ( String [] ARGs )
{
System . Console . Writeline ( "Sum (1, 2, 3, 4, 5) =" + ( Sumwithvariableparams ( 1 , 2 , 3 , 4 , 5 )). Tostring ());
System . Console. Writeline ( "Sum (33, 22) =" + ( Sumwithvariableparams ( 33 , 22 )). Tostring ());
System . Console . Readline ();
}
}