unit1.cpp

简单的加解密

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
void discrypt(char m1[10], char c1[10]);
 void encrypt(char m[10],char c[10]);
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------



void __fastcall TForm1::Button2Click(TObject *Sender)
{
  char c[10];
  String q ;
  q=Edit1->Text;
  encrypt(q.c_str(),c);
  Edit2->Text=c;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
 String p;
 char c[10];
 p= Edit2->Text;
 discrypt(p.c_str() ,c);
 Edit3->Text=c;
}
//---------------------------------------------------------------------------
 void encrypt(char m[10],char c[10])
{
   int k=3;
   int i;
 for(i=0;m[i]!='\0';i++)
   c[i]=(m[i]-'a'+k)%26 +'a';


}

 void discrypt(char m1[10], char c1[10])
{
  int k=3;
  int q;
   for( q=0;m1[q]!='\0';q++)
    c1[q]=(m1[q]-'a'-k+26) %26 +'a';
}