How to convert binary to sentence

Question

I've created a simple Program to store and Retrieve the Passwords whenever I want.

For example, I have one password which is Pass so its binary will be 01010000011000010111001101110011. I've created a program that will convert it to binary and will store it in the file. The Program is as given Below:

#include<stdio.h>
#include<conio.h>
#include<string.h>
main()
{
    FILE *fptr;
    char wname[100];
    char uname[100];
    char pass[100];
    char str[50];
    char bin[7];
    int c2n,i,ii;
    clrscr();
    printf("\nEnter website name: ");
    fflush(stdin);
    gets(wname);
    printf("\nEnter the username: ");
    fflush(stdin);
    gets(uname);
    printf("\nEnter password: ");
    fflush(stdin);
    gets(pass);
    fptr=fopen("DND","a");
    printf("Binary of entered string is : ");
    fprintf(fptr,"\n");
    for(i=0;i<=strlen(wname)-1;i++)
    {
        c2n=wname[i];
        for(ii=7;ii>=0;ii--)
        {
            bin[ii]=c2n%2;
            c2n=c2n/2;
        }
        for(ii=0;ii<=7;ii++)
        {
            printf("%d",bin[ii]);
            fprintf(fptr,"%d",bin[ii]);
        }
    }
    printf(":");
    fprintf(fptr,":");
    for(i=0;i<=strlen(uname)-1;i++)
    {
        c2n=uname[i];
        for(ii=7;ii>=0;ii--)
        {
            bin[ii]=c2n%2;
            c2n=c2n/2;
        }
        for(ii=0;ii<=7;ii++)
        {
            printf("%d",bin[ii]);
            fprintf(fptr,"%d",bin[ii]);
        }
    }
    printf(":");
    fprintf(fptr,":");
    for(i=0;i<=strlen(pass)-1;i++)
    {
        c2n=pass[i];
        for(ii=7;ii>=0;ii--)
        {
            bin[ii]=c2n%2;
            c2n=c2n/2;
        }
        for(ii=0;ii<=7;ii++)
        {
            printf("%d",bin[ii]);
            fprintf(fptr,"%d",bin[ii]);
        }
    }
    fclose(fptr);
    printf("\n Your website name,user name and password are protected in binary....\nPress any key to close coder......");
    getch();
    return 0;
}

Now, I want to create Decoder for this.I want a program to convert all the binary to one sentence. For example.

01010000011000010111001101110011=Pass

I have no Idea how to create it.

Answer 1

Here's something that works for me.

#include <stdio.h>

int main(int argc, char** argv)
{
   int ch1 = 0;
   int ch2 = 0;
   int count = 0;

   // Pass the binary file to be read from as the first argument.
   char* file = argv[1];

   FILE* in = fopen(file, "r");
   if ( in == NULL )
   {
      printf("Unable to open file %s\n", file);
      return 1;
   }

   while ( (ch1 = fgetc(in)) != EOF )
   {
      if ( ch1 == '\n' )
      {
         // Reset counters.
         ch2 = 0;
         count = 0;
         fputc(ch1, stdout);
      }
      else if ( ch1 == ':' )
      {
         // Skip it for computing characters.
         fputc(ch1, stdout);
      }
      else
      {
         ch2 <<= 1;
         if ( ch1 == '1' )
         {
            ch2 += 1;
         }
         count++;
         if ( count == 8 )
         {
            fputc(ch2, stdout);
            count = 0;
         }
      }
   }

   fputc('\n', stdout);
   fclose(in);

   return 0;
}