//+ Decryption ...
//+ source


#include <iostream>
#include <fstream>
#include <cstdlib>
using namespace std;
const int kSTART = 0;
const int kINCREMENT = 1;
static int substitutions[] = {
'U', 'L', 'd', '{', 'p', 'Q', '@', 'M',
'-', ']', 'O', 'r', 'c', '6', '^', '#',
'Y', 'w', 'W', 'v', '!', 'F', 'b', ')',
'+', 'h', 'J', 'f', 'C', '8', 'B', '7',
'.', 'k', '2', 'u', 'Z', '9', 'K', 'o',
'3', 'x', ' ', '\'', '=', '&', 'N', '*',
'1', 'z', '(', '`', 'R', 'P', ':', 'l',
'4', '0', 'e', '$', '_', '}', 'j', 't',
'?', 'S', 'q', '>', ';', 'T', 'y', 'i',
'\\', 'A', 'D', 'V', '5', '|', '<', '/',
'E', 'g', 'm', ',', '[', 'H', '%', 'a',
's', 'n', 'I', 'X', '~', '"', 'G'
};
const int len = sizeof(substitutions) / sizeof(int);
static int rtable[len];
static ifstream infile;
void MakeRTable(void);
void Decrypt(void);
void OpenInputfile(void);
void SaveToFile(const char m[]);
void OpenInputfile(void)
{
const int kNAMESIZE = 100;
char filename[kNAMESIZE];
cout <<"\t\t\t:] CODED BY XXLB::OREN [:"<<endl;
cout << "\n\nName of file to decrypt :> " ;
cin.getline(filename, kNAMESIZE-1, '\n');
cout <<"\n\n--------------------------------------------------------------------------------"<<endl;
infile.open(filename, ios::in);
if(!infile.good()) {
cout << "Can't open that file. Quitting." << endl;
exit(1);
}
}
void MakeRTable(void)
{
for(int i = 0;i < len; i++) {
int tem = substitutions[i];
tem -= ' ';
rtable[tem] = i;
}
}
void Decrypt(void)
{
int ch;
int linepos = 0;
int k = kSTART;
ch = infile.get();
while(ch != EOF) {
int t = rtable[ch - 32];
t -= k;
while(t<0) t+= len;
cout << char(t + ' ');
if((t==0) && (linepos > 60))
{ cout << endl; linepos = 0; }
k += kINCREMENT;
ch = infile.get();
}
cout <<"\n\n--------------------------------------------------------------------------------"<<endl;
}
int main()
{
OpenInputfile();
MakeRTable();
Decrypt();
system("pause");
return 0;
}