// Virtual CD-ROM 1.0 Unlock Key Generator

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void main(void)
{
char CodeEntry[12];
char YourCode[9];
int i;
printf("Virtual CD-ROM 1.0 Unlock Key Generator\n");
printf("Enter Registration Number:");
gets(CodeEntry);
i = strlen(CodeEntry);
if ( i != 12)
   {
   printf("Entry Code must be 12 digits");
   exit(1);
   }
for ( i = 0; i < 8 ; i++) YourCode[i]='0'; YourCode[8]=0;
YourCode[2]=CodeEntry[9];
YourCode[4]=CodeEntry[8];
YourCode[6]=CodeEntry[5];

if (CodeEntry[10]>'3') YourCode[0]='3';
else
   YourCode[0]=CodeEntry[10];
if (CodeEntry[11] < '3') YourCode[1]='3';
else
   YourCode[1]=CodeEntry[11];
if (CodeEntry[6] < '5') YourCode[3]='5';
else
   YourCode[3]=CodeEntry[6];
if (CodeEntry[7] > '2') YourCode[5]='2';
else
   YourCode[5]=CodeEntry[7];
if (CodeEntry[11] < '7') YourCode[7]='7';
else
   YourCode[7]=CodeEntry[7];
printf("Your's happy unlock code is: %s\n",YourCode);
}