سورس کد اینکریپت و دیکریپت (سی)

کد:
Encryption-Decryption#include<stdio.h>void main()

{

FILE *fp,*fp1;

int choi;

char name[20],temp[20]={"Temp.txt"},c;

clrscr();

printf("Press 1 to Encrypt:

Press 2 to Decrypt");

printf("Enter your Choice:");

scanf("%d",&choi);

switch(choi)

{

case 1:

printf("Enter the filename to Encrypt:");

scanf("%s",name);

fp=fopen(name,"r+");

if(fp==NULL)

  {

     printf("The file %s can't be open",name);

     getch();

     exit();

  }

fp1=fopen(temp,"w+");

if(fp1==NULL)

 {

   printf("The file Temp can't be open");

   getch();

   exit();

 }

 c=fgetc(fp);

while(c!=EOF)

 {

 fputc((c+name[0]),fp1);printf("%c",c+name[0]);getch();

 c=fgetc(fp);

 }

 fclose(fp);

 fclose(fp1);

remove(name);

rename(temp,name);

printf("The file is Encrypted:");

getch();

break;

case 2:

     printf("Enter the Filename to Decrypt:");

     scanf("%s",name);

     fp=fopen(name,"r+");

     fp1=fopen(temp,"w+");

     c=fgetc(fp);

     while(c!=EOF)

                {

                fputc(c-name[0],fp1);

                c=fgetc(fp);

                }

                fclose(fp);

                fclose(fp1);

                remove(name);

                rename(temp,name);

                printf("The file is decrypted:");

                getch();

  }

}