//typonet.cpp by Rupert Scammell (fib@lumiere.net).  This code is public
//domain. 
// This is version 1.00b1.web1, 5.14.1999. 
// Please email me if you have any questions or comments. 
// The latest version of this code can be found at
//http://lumiere.net/~fib/code.hmtl 
// any statement commented with "debug" may be safely removed if you
//wish... internal use during development.


#include <stdio.h> 
#include <stdlib.h> 
#include <iostream.h> 
#include <string.h> 
#include <string>
#include <fstream.h> 
#include <time.h> 
#include <ctype.h> 

using namespace std; 
int main() { 
string proxstr[4]={"`~1!2@3#4$5%6^7&8*9(0)-_=+","qQwWeErRtTyYuUiIoOpP[{]}\\|",
		   "aAsSdDfFgGhHjJkKlL;:'","zZxXcCvVbBnNmM,<.>/?"};
string instring,outstring,stringtemp; 
int howlong; 
int count=0; 
int pos;
int foundit=string::npos; 
int arnum; 
int distort; 
int maybe; 
int numtypos=100;
int foundtemp; 
int rowdistort; 
int already=0; 
int inversion; 

ofstream typeout("typofile",ios::app);
cout << "Enter a string: "; getline(cin, instring); howlong =
instring.length(); cout << instring << " is " << howlong << " characters
long." << endl;
cout << "Here are some possible typos for this word: " << endl;
srand((unsigned int) time(NULL)*rand() ); 
   while (numtypos > 0) 
   {
   outstring=""; 
   srand((unsigned int) time(NULL)* rand()); 
   //cout << "numtypos: " << numtypos << endl; // debug code
   
      while (count < howlong)
      {
      srand((unsigned int) time(NULL)* rand());

      // cout << "entered count<howlong while with count = " << count <<
      //endl; 
      //debug code
      arnum=-1;
      foundit=string::npos;
       	   while (foundit == string::npos && arnum<5)
	   {
	   //cout << "entered foundit==string::npos while, arnum = " <<
           //arnum << endl; // debug code
	   arnum++;
	   foundit = proxstr[arnum].find(instring.substr(count,1));
	   }
	
	if (arnum >= 5)
	{
	cout << "The character " << instring.substr(count,1) << " could
not be found in the database." << endl;
	}
        maybe = rand();
	
	if (maybe > 15000 && maybe < 15900) // greater range= > errors
	{
	rowdistort = rand();
	inversion = rand();
	//cout << "entered maybe > 15000 if " << endl; // debug code
	distort=9;			
	foundtemp = foundit;
		while(distort > 4 || distort < 0 || foundtemp < 0)
		{
		//cout << "entered the distort rand generator.. distort =
		//" << distort << endl; //debug code
		distort = rand();
		foundtemp=foundit + distort;
		foundtemp = 25 - foundtemp;
		//cout << "in distort rand generator, foundtemp = " <<
		//foundtemp << endl; // debug
		}
		
		
		if (rowdistort > 1000 && rowdistort < 1900)
		{
		//cout << "enter with arnum = " << arnum << endl; //debug
			if (arnum+distort < 4)
			{
			arnum=arnum+distort;
			already=1;
			}
			
			if (arnum-distort >=0 && already==0)
			{
			arnum=arnum-distort;
			already=0;
			}
		
		//cout << "leave with arnum = " << arnum << endl;  //debug
		}
		if (inversion > 8000 && inversion < 8500)
		{
		// character inversion code here eventually.
		}
					
   		foundit=foundit+distort; // distort upwards in the chain..
		
	        cout << "ended the if with distort = " << distort << " and
                foundit= " << foundit << endl; // debug code;
		
	}
   	
      pos = 25-foundit;
      cout << "pos = 25-foundit returned " << pos << endl;
      outstring.insert(count,proxstr[arnum].substr(foundit,1) );
      count++;
     } 
   cout << outstring << endl; 
   typeout << outstring << "\n";
   numtypos--; count=0; 
   } 

typeout.close(); 
return 0; 
}