Standard Implementation of strcpy and memcpy

// ========================================================== ==========================================
// Name: helloworld. cpp
// Author: chio <chio.yang@gmail.com>
// Version: ver.1.0.0
// Copyright: suprasoft Inc ,.
// Description: Todo
// ========================================================== ==========================================

# Include < Iostream >
# Include < String . H >
# Include < Cassert >
Using   Namespace STD;

Char   * Strcpy ( Char   * DST, Const   Char   * SRC ){
Assert (SRC ! = Null && DST ! = Null );
Char   * RET = DST;
While (( * DST ++   =   * SRC ++ ) ! =   ' \ 0 ' );
Return RET;
}

Void   * Memcpy ( Void   * DST, Const   Void   * SRC, size_t Len ){
Assert (SRC ! = Null && DST ! = Null );
Void   * RET = DST;
Int I = Len;
// Anti-overlap
If (SRC < DST ){
Char   * CSRC = ( Char   * ) SRC;
Char   * Cdst = ( Char   * ) DST;
While (I -- ){
* Cdst ++   =   * CSRC ++ ;
}
} Else {
Char   * CSRC = ( Char   * ) SRC + Len -   1 ;
Char   * Cdst = ( Char   * ) DST + Len -   1 ;
While (I -- ){
* Cdst --   =   * CSRC -- ;
}
}

ReturnRET;
}

Int Main (){
Char   * SRC =   " Hello World " ;
Char   * DST =   New   Char [ 0 ];
Cout < Strcpy (DST, Src) < Endl;
Void   * Memsrc = ( Void   * ) " Hello " ;
Char Memdst [ 6 ];
Memdst [ 5 ] =   ' \ 0 ' ;
Cout < ( Char   * ) Memcpy (memdst, memsrc, 5 ) < Endl;

Return 0;
}