DECRYPTION IN UNIX C

DECRYPTION

[ragava@localhost ~]$ cat dc.c
#include<stdio.h>

main(int argc, char *argv[])
        {
                int i;
                char a[2000],b;
                FILE *fp;
                if(argc!=2)
                        {
                                printf("Usage error");
                                return;
                        }

                fp=fopen(argv[1],"r");
                if(fp==NULL)
                        {
                                printf("ERROR IN OPENING A FILE");
                                return;
                        }
                for(i=0,a[i]=getc(fp);feof(fp)!=0;a[++i]=getc(fp))
                                 ;
                a[i]='\0';
                fclose(fp);
                remove(argv[1]);
                fp=fopen(argv[1],"w");

                for(i=0;a[i]!='\0';i++)

                        {
                                b=a[i]-2;
                                putc(b,fp);
                        }
                fclose(fp);
        }

[ragava@localhost ~]$
 

ENCRYPTION IN UNIX C

ENCRYPTION

[ragava@localhost ~]$ cat ec.c
#include<stdio.h>

main(int argc, char *argv[])
        {
                int i;
                char a[2000],b;
                FILE *fp;
                if(argc!=2)
                        {
                                printf("Usage error");
                                return;
                        }

                fp=fopen(argv[1],"r");
                if(fp==NULL)
                        {
                                printf("ERROR IN OPENING A FILE");
                                return;
                        }
                for(i=0,a[i]=getc(fp);feof(fp)!=0;a[++i]=getc(fp))
                                 ;
                a[i]='\0';
                fclose(fp);
                remove(argv[1]);
                fp=fopen(argv[1],"w");

                for(i=0;a[i]!='\0';i++)

                        {
                                b=a[i]+2;
                                putc(b,fp);
                        }
                fclose(fp);
        }

 

SENDING MAIL THROUGH C#

SMTP MAIL IN C SHARP

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Net.Mail;

namespace mailing
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            MailMessage message = new MailMessage();
            message.To.Add("ragava08@ymail.com");
            message.Subject = "SUBJECT";
            message.From = new MailAddress("ragava08@gmail.com");
            message.Body = "BODY PART";
            SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
            SmtpServer.Port = 587;
         SmtpServer.Credentials = new System.Net.NetworkCredential("ragava08@gmail.com", "password");
            SmtpServer.EnableSsl = true;
            SmtpServer.Send(message);
            MessageBox.Show("Message successfully sent");

        }
    }
}