PROGRAM TO GENERATE IP ADDRESSES

/***********************************************************************/
/* PROGRAM TO GENERATE IP ADDRESSES                                    */
/* AUTHOR : DEEPAK MAHAKALE 3 YEAR IT SRCOEM                           */
/* BLOG : www.mahakaledeepak.blogspot.com                              */
/***********************************************************************/
#include<stdio.h>
#include<conio.h>
void main() {
  int n1, n2, n3, n4, i, j, k, l, m, cnt = 0, a[50];
  clrscr();
  printf("\n\t* IP ADDRESSES ALLOTTED TO RCOEM * ");

  for (i = 5; i < 50; i++) {
    n1 = i;
    for (j = 1; j < 255; j++) {
      n2 = j;
      for (k = 5; k < 50; k++) {
        n3 = k;
        for (l = 1; l < 255; l++) {
          n4 = l;
          if (n1 + n3 <= 50) {
            if (n1 % n4 == 0 && n3 % n4 == 0) {
              m = 1;
              a[3] = 1000, cnt = 0;
              while (m < 10) {
                if (n4 % m == 0) {
                  a[++cnt] = m;
                }
                m++;
              }
              if (n2 == a[3] && n2 != n4) {
                {
                  printf("\n\t %d.%d.%d.%d", n1, n2, n3, n4);
                }
              }
            }
          }
        }
      }
    }
  }
  getch();
}

PROGRAM TO DETECT WHETHER ENTERED NUMBER IS DIVISIBLE BY 11

/***********************************************************************/
/* PROGRAM TO DETECT WHETHER ENTERED NUMBER IS DIVISIBLE BY 11         */
/* AUTHOR : DEEPAK MAHAKALE 3 YEAR IT SRCOEM                           */
/* BLOG : www.mahakaledeepak.blogspot.com                   */
/***********************************************************************/
#include<stdio.h>
#include<conio.h>
void main()
{

    long int r=0,i=1,odd=0,even=0,no,n,rev=0;
    clrscr();
    printf("\n\t PROGRAM TO DETECT WHETHER ENTERED NUMBER IS DIVISIBLE BY 11 ");
    printf("\n\n\t Enter any number : ");
    scanf("%ld",&n);
    no=n;

        while(no!=0)
       {
          
           r=no%10;
           rev=rev*10+r;
           no=no/10;

       }

       while(rev!=0)
       {

           r=rev%10;
           if(i%2==0)
           {
           even=even+r;
           }
           else
           {
           odd=odd+r;
           }
           rev=rev/10;
           i++;
       }

    printf("\n\t Odd  sum = %ld \n ",odd);
    printf("\n\t Even sum = %ld \n ",even);

    if(odd==even)
    printf("\n\t %ld Is Divisible by 11",n);
    else
    printf("\n\t %ld Is Not Divisible by 11",n);
    getch();

}

PROGRAM TO VERIFY PRIME NUMBERS PROPERTY

/***********************************************************************/
/* PROGRAM TO VERIFY PRIME NUMBERS PROPERTY                            */
/* AUTHOR : DEEPAK MAHAKALE 3 YEAR IT SRCOEM                           */
/* BLOG : www.mahakaledeepak.blogspot.com                              */
/***********************************************************************/

#include<stdio.h>
#include<conio.h>

void main() {

  int n, prime, i, j, k, l;
  clrscr();
  printf("\n\t PROGRAM TO VERIFY PRIME NUMBERS PROPERTY");
  printf("\n\n\t Enter any number : ");
  scanf("%d", & n);

  printf("\n\t PRIME NO.  REMAINDER 1 WHEN DIVIDED BY 4 ");
  for (i = 2; i < n; i++) {
    prime = 1;
    for (j = 2; j < i; j++) {
      if (i % j == 0)
        prime = 0;
    }
    if (prime == 1) {
      // printf("\n\t %d",i);
      if (i % 4 == 1) {
        for (k = 1; k < n; k++) {
          for (l = 1; l < n; l++) {
            if ((k * k) + (l * l) == i) {
              printf("\n\t %d  -->  %d + %d = %d\ti.e %d SQ + %d SQ  ", i, k * k, l * l, i, k, l);
            }
          }
        }
      }
    }
  }
  printf("\n\n\n\t BY - DEEPAK MAHAKALE");
  getch();

}

PROGRAM TO VERIFY VALIDITY OF DATE

/***********************************************************************/
/* PROGRAM TO VERIFY VALIDITY OF DATE                                  */
/* AUTHOR : DEEPAK MAHAKALE 3 YEAR IT SRCOEM                           */
/* BLOG : www.mahakaledeepak.blogspot.com                              */
/***********************************************************************/

#include<stdio.h>
#include<conio.h>

void main() {

  int d, m, y, y_i = 0, d_i = 0, leap = 0, i, d_l = 0;
  clrscr();
  printf("\n\t PROGRAM TO VERIFY VALIDITY OF DATE ");
  printf("\n\n\t Enter the date (dd mm yyyy) : ");
  scanf(" %d %d %d", & d, & m, & y);

  if (y < 1600 || y > 2100) // Change this range acc. to you...
  {
    printf("\n\t Year  invalid..");
    y_i = 1;
  } else {
    printf("\n\t Year  valid..");
  }

  if (y_i != 1) {
    if (y % 4 == 0)
      leap = 1;
  }

  if (m < 1 || m > 12) {
    printf("\n\t Month invalid..");
  } else {
    printf("\n\t Month valid..");
  }

  if (d < 1 || d > 31) {
    d_i = 1;
  }

  if (m >= 1 && m <= 7) {
    for (i = 1; i <= 6; i++) {
      if (m % 2 == 0)
        d_l = 30;
      if (m % 2 == 1)
        d_l = 31;
    }
  }

  if (leap == 0 && m == 2) {
    d_l = 28;
  }

  if (leap == 1 && m == 2) {
    d_l = 29;
  }

  if (m >= 8 && m <= 12) {
    for (i = 7; i <= 12; i++) {
      if (m % 2 == 0)
        d_l = 31;
      if (m % 2 == 1)
        d_l = 30;
    }
  }
  if (d > d_l)
    d_i = 1;

  if (d_i == 1)
    printf("\n\t Date  invalid..");
  if (d_i == 0)
    printf("\n\t Date  valid..");

  printf("\n\n\n\t BY - DEEPAK MAHAKALE");
  getch();

}

PROGRAM TO PRINT A CALENDAR

/********************************************************/
/* PROGRAM TO PRINT A CALENDAR                          */
/* AUTHOR : DEEPAK MAHAKALE 3 YEAR IT SRCOEM            */
/* BLOG : www.mahakaledeepak.blogspot.com               */
/********************************************************/

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

void main() {

  int i, j, f_d, t_d, dt = 1;
  clrscr();
  printf("\n\t PROGRAM TO PRINT A CALENDAR ");
  printf("\n\n\t Enter total no of days : ");
  scanf("%d", & t_d);
  printf("\n\t Enter first day <0-Mon..5-Sat,6-Sun> : ");
  scanf("%d", & f_d);

  printf("\n\n\t M \t T \t W \t T \t F \t S \t S \n");
  printf("\t _________________________________________________\n");

  for (j = f_d; j > 0; j--) {
    printf("\t");
  }

  while (dt <= t_d) {
    if (f_d != 0) {
      if (f_d % 7 == 0)
        printf("\n");
    }
    printf("\t %d", dt);
    dt++;
    f_d++;
  }

  printf("\n\n\n\t BY - DEEPAK MAHAKALE");
  getch();

}