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();

}