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【C】实现简易文档加密

作者:Dezai.CN / 发布于2011/11/22/ 541

<div>
<pre>
#include<iostream>
#include<fstream>
using namespace std;
#include<string>

string encode="abcdefghijklmnopqrstuvwxyzACBDFEHGJILKNMPQOSTRUVZYXW1234567890[];'\,./{}:|<>?\"~!@#$%^&*()_+";//????    
string decode="STRUVZYXWqazxBDO39f~01/48rACN657!MPQ%$#@2bnyujEHGJmlFILh,ki&^Kswedcv\>\"<+_)(*]tgo'.,;[?|}{:";//????
//encode??decode?????


string decoder(string s)//???????
{
 for(int i=0;i<s.length();i++)
 {
  for(int j=0;j<92;j++)
  {
   if(s[i]==decode[j])
   {
    s[i]=encode[j];
    break;
   }
  }
 }
 return s;
}

string encoder(string s)//???????
{
 for(int i=0;i<s.length();i++)
 {
  if('s[i]'-'0'<47)
	  s[i]=s[i]+32;
  for(int j=0;j<92;j++)
  {
   if(s[i]==encode[j])
   {
    s[i]=decode[j];
    break;}}}
 return s;
}


void main()//??????
{
 string s;//???庯??s
 int i=0;

 cout<<"----------?????????????----------"<<endl<<endl<<endl;//?????

	int a;
	cout<<"????????????????1????????  2???????????"<<endl;
	cout<<"?????????";cin>>a;

if(a==1)
	{
	const int SIZE=100;
        char b[SIZE];
        cout << "???????????????????? ";
        cin >> b;
        ifstream infile(b);
        string    s;
		if(!infile.good())
		{
			cout<<"**********?????????**********"<<endl;
		}
		while(infile>>s)
		{
			cout<<endl<<"??????????"<<endl<<s<<endl;
			s=decoder(s);
			cout<<endl<<"????????:"<<endl<<s;
		}
		cout<<endl<<endl;
	}



else if(a==2)//???????
	{
	ofstream file;
    char a[100];
    cout << "?????&frac12;??????????? ";
    cin >> a;
    file.open(a);
	if(file.good())
	{
		cout<<"**********??????????**********"<<endl<<endl<<endl;
		cout<<"????????:"<<endl;
	    cin>>s;	
	    s=encoder(s);
	    file<<s;
		cout<<endl<<endl<<"??????????"<<endl<<s<<endl;
		file.close();
	}
	else
	{
		cout<<"**********??????????**********"<<endl<<endl<<endl;
	}
	  
	  
	  
	}


else
	{
		cout<<"**********&delta;??????**********"<<endl;
	}
cout<<endl;
}</pre>
</div>

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