Problem in decrypting in case of Arithmetic Coding

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C

There is some problem in decryption of arithmetic Encoding. Unable to sort out..
It works well with atmost 8 character but not more than that... Don't know whats the problem please help..Thanx in advance..
Example: How r u - works fine
Example: How is your mom - wrong output


Sample Code is as Follows:

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

float PC[96];

char N[96];

float P[96];

char string[100];

float LOW=0.0;

float RANGE=1.00;

long int p,q,n,t,flag,e[100],d[100],temp[100],j,en[100],i;
char msg[100];


long int cd(long int);
void encrypt();
void decrypt();


float LOW_RANGE(int k)

{

    LOW=LOW+PC[k]*RANGE;

    RANGE=RANGE*P[k];

   
    return 0;

}


int main()

{

   int c = 0, count[96] = {0};
   int g=0;
   int j;
   int i;
   int k;
   int a;
   char choice;
   float f;
   clrscr();
   PC[0]=0.0;
  printf("Enter a string\n");

   fgets(string,sizeof(string),stdin);

   k=strlen(string)-1;

   printf("String length: %i\n",k);

   while ( string[c] != '\0' )

   {

      /* Considering characters from ' ' to '~' only */


      if ( string[c] >= ' ' && string[c] <= '~' )

       {

     count[string[c]-' ']++;

       }

      c++;

   }

   for ( c = 0 ; c < 96 ; c++ )

   {

      if( count[c] != 0 )

      {

     printf("%c occurs %d times in the entered string.\n",c+' ',count[c]);

     P[g]=(float)count[c]/(float)(strlen(string)-1);

     a=c+' ';

     printf("%i\n",a);

     N[g]=a;

     printf("P[%i]=%f\n",g,P[g]);

     g++;

      }

   }

   printf("no. of distinct characters: %i\n",g);


   printf("PC[0]=%f\n",PC[0]);

   for(j=1;j<=g;j++)

   {

    PC[j]=PC[j-1]+P[j-1];

    printf("PC[%i]= %f\n",j,PC[j]);

   }


   for(i=0;i<(strlen(string)-1);i++)

   {

    for(j=0;j<g;j++)>

    {

        if(string[i]==N[j])

        {

            LOW_RANGE(j);

            break;

        }

    }

    }

   f=(LOW+LOW+RANGE)/2;

   printf("\nThe encrypted message= %f\n",f);

   sprintf(msg,"%f",f);
   printf("%s",msg);


     printf("\nThe original message: ");

     for(i=0;i<strlen(string)-1;i++)>
     {
    for(j=0;j<g;j++)>
    {
    if((f>PC[j]) && (f<pc[j+1]))>
    {
        LOW=PC[j];
        RANGE=PC[j+1]-PC[j];
        f=(f-LOW)/RANGE;
        printf("%c",N[j]);
        break;
    }
    }
     }
  printf("\n");
/*}
else
{
    exit(0);

}*/

getch();
return 0;
}

long int cd(long int x)
{
long int k=1;
while(1)
{
    k=k+t;
    if(k%x==0)
    return(k/x);
}
}
void encrypt()
{
long int pt,ct,key=e[0],k,len;
i=0;
len=strlen(msg);
while(i!=len)
{
    pt=msg[i];
    pt=pt-96;
    k=1;
    for(j=0;j<key;j++)
    {
    k=k*pt;
    k=k%n;
    }
    temp[i]=k;
    ct=k+96;
    en[i]=ct;
    i++;
}
en[i]=-1;
printf ("\nTHE ENCRYPTED MESSAGE IS\n");
for(i=0;en[i]!=-1;i++)
printf("%c",en[i]);
}

void decrypt()
{
long int pt,ct,key=d[0],k;
i=0;
while(en[i]!=-1)
{
    ct=temp[i];
    k=1;
    for(j=0;j<key;j++)>
    {
    k=k*ct;
    k=k%n;
    }
    pt=k+96;
    msg[i]=pt;
    i++;
}
msg[i]=-1;
printf("\nTHE DECRYPTED MESSAGE IS\n");
for(i=0;msg[i]!=-1;i++)
printf("%c",msg[i]);
}

[edit]Code block added - OriginalGriff[/edit]