Encryptor and Decryptor in C

#include<stdio.h>

#include<conio.h>

#include<stdlib.h>

#include <unistd.h>

void pass();

void enc();

void dec();

void menu();

void load();

int main()

{

    pass();

}

void pass()

{

printf("\n\n\n\t\t \xB2\xB2\xB2\xB2\xB2\xB2\xB2 DENcryptor \xB2\xB2\xB2\xB2\xB2\xB2\xB2\n\n");

printf(" \t\t \xb2 DEN Key is the secret code for\n\t\t   your encryption and decryption \n\n\n");

menu();

}

void menu()

{

    printf("\n\t\t \xB2\xB2\xB2\xB2\xB2 Press (e) to Encrypt\n\n\t\t \xB2\xB2\xB2\xB2\xB2 Press (d) to Decrypt\n\n\t\t ");

    char sl;

      switch(getch())

  {

    case 'e':

        enc();

        break;

    case 'd':

        dec();

        break;

    default:

        menu();

  }

}

void enc()

    {

    system("CLS");

char filen[20], ch, choice;

int key;

printf("\t\t Enter a DEN Key.(Numbers Only)\n\t\t Remember your DEN Key as it is\n\t\t required  later to Decrypt properly\n\t\t =");

            scanf("%d",&key);

            fflush(stdin);

FILE *fps, *fpt;

printf("\t\t Make sure you have the .txt file in program directory\n \t\t Remember put .txt after file name\n ");

printf("\t\t Enter file name to encrypt: \n\t\t =");

gets(filen);

fps=fopen(filen, "r");

if(fps==NULL)

{

printf("\t\t Error in opening file..!!");

printf("\n\t\t Press any key to exit...\n\n\n\n\n");

getch();

exit(1);

}

fpt=fopen("temp.txt", "w");

if(fpt==NULL)

{

printf("\t\t Error in creating temp.txt file..!!");

fclose(fps);

printf("\n\t\t Press any key to exit...");

getch();

exit(2);

}

while(1)

{

ch=fgetc(fps);

if(ch==EOF)

{

break;

}

else

{

ch=ch+key;

fputc(ch, fpt);

}

}

fclose(fps);

fclose(fpt);

fps=fopen(filen, "w");

if(fps==NULL)

{

printf("\t\t Error in opening source file..!!");

printf("\n\t\t Press any key to exit...");

getch();

exit(3);

}

fpt=fopen("temp.txt", "r");

if(fpt==NULL)

{

printf("\t\t Error in opening temp.txt file...!!");

fclose(fps);

printf("\n Press any key to exit...");

getch();

exit(4);

}

while(1)

{

ch=fgetc(fpt);

if(ch==EOF)

{

break;

}

else

{

fputc(ch, fps);

}

}

load();

printf("\t\t File %s encrypted successfully..!!\n\n\n\n", filen);

fclose(fps);

fclose(fpt);

}

dec()

{

    system("CLS");

char ch, choice, storage[20];

int key;

printf("\t\t Enter DEN Key\n\t\t previously used to decrypt this file.\n\t\t =");

scanf("%d",&key);

    fflush(stdin);

FILE *fps, *fpt;

printf("\t\t Make sure you have the .txt file in program directory\n\t\t Remember put .txt after file name\n ");

printf("\t\t Enter file name to decrypt : \n\t\t =");

gets(storage);

fps=fopen(storage, "w");

if(fps==NULL)

{

printf("\t\t Error in opening source file..!!");

printf("\n\t\t Press any key to exit...");

getch();

exit(7);

}

fpt=fopen("temp.txt", "r");

if(fpt==NULL)

{

printf("\t\t Error in opening temp.txt file..!!");

fclose(fps);

printf("\n\t\t Press any key to exit...");

getch();

exit(9);

}

while(1)

{

ch=fgetc(fpt);

if(ch==EOF)

{

break;

}

else

{

ch=ch-key;

fputc(ch, fps);

}

}

load();

printf("\t\t File %s decrypted successfully..!!\n\n\n\n",storage);

printf("\n\t\t Press any key to exit...");

fclose(fps);

fclose(fpt);

getch();

}

void load()

{

    int amount=20;

    for ( int loop = 0; loop < 1; ++loop) {

        for ( int each = 0; each < 5; ++each) {

            printf ( "\rLOADING%.*s   \b\b\b", each, ">>>");

                        printf(" %d%%",amount);

                        amount=amount+20;

            fflush ( stdout);

            sleep (1);

        }

    }

    printf ( "\n");

    system("cls");

}