duobiao.cpp

一个多表加解密程序

// Duobiao.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "Duobiao.h"


int main(int argc, char* argv[])
{
	DuoBiao db;
	char inpoint[32]="1.c";
	char outpoint[32]="2.c";
	char ch;
	
	cout<<"Source file name : ";
	cin>>inpoint;
	cout<<"Destination file name : ";
	cin>>outpoint;
    
	if(db.setpoint(inpoint, outpoint))
	{
		while(1)
		{
			cout<<"Encode (E) or Decode (D) ?\n";
		    cin>>ch;
	        cout<<"Key : ";
	        cin>>db.key;
			switch(ch)
			{
			case 'E' :
			case 'e' :   db.encode();
                         return 1;
			case 'D' : 
			case 'd' :   db.decode();
						 return 1;   
			}
		}
	}

	return 0;
}


//////////////////////////////////////////////////////////////////////
// DuoBiao Class
//////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

DuoBiao::DuoBiao()
{
    ip=0;
}

DuoBiao::~DuoBiao()
{

}


int DuoBiao::setpoint(char *inpoint, char *outpoint)
{
	fin.open(inpoint, ios::in, 0);
	if(!fin)
	{
	    cout<<"Error : file1 can't open !\n";
		return 0;
	}

	fout.open(outpoint, ios::out, 0);
	if(!fout)
	{
	    cout<<"Error : file1 can't open !\n";
		return 0;
	}

	return 1;
}

void DuoBiao::decode()
{
     ctemp1=fin.get();
	 while(!fin.eof())
	 {
          ctemp2=ctemp1+'a'-key[ip++];
		  fout.put(ctemp2);
		  if(key[ip]=='\0')  ip=0;
		  ctemp1=fin.get();
	 }
}

void DuoBiao::encode()
{
     ctemp1=fin.get();
	 while(!fin.eof())
	 {
	      ctemp2=ctemp1-'a'+key[ip++];
		  fout.put(ctemp2);
		  if(key[ip]=='\0')  ip=0;
		  ctemp1=fin.get();
	 }
}