Miscellaneous – VI – Date Related Programs

Some Date Manipulation programs.

---

#include <stdio.h>

#include <conio.h>

#include <stdlib.h>

//Find Date after Numbers of Days

  int Leap(int y)

      {

           if(y%100!=0 && y%4==0)

              {

                   return 1;

              }

           if(y%100==0 && y%400==0)

              {

                   return 1;

              }

           return 0;

      }

  int valid(int dd,int mm,int yy,int mn[])

      {

           if(mm>12 || mm<1)

              {

                   return 1;

              }

           if(yy<1)

              {

                   return 1;

              }

           if(dd>mn[mm-1])

              {

                   return 1;

              }

           return 0;

      }

  void main()

      {

           int m[12]={31,28,31,30,31,30,31,31,30,31,30,31};

           int dd,mm,yy,n,c;

           clrscr();

           printf("\n\tEnter Day : ");

           scanf("%d",&dd);

           printf("\n\tEnter Month : ");

           scanf("%d",&mm);

           printf("\n\tEnter  Year : ");

           scanf("%d",&yy);

           c=valid(dd,mm,yy,m);

           if(c==1)

           {

              printf("\n\n\t%d-%d-%d is an invalid Date ",dd,mm,yy);

              getch();

              exit(0);

           }

           printf("\n\tEnter Nos. of Days to Add : ");

           scanf("%d",&n);

           printf("\n\tInput Date %2d/%2d/%4d is ",dd,mm,yy);

           printf("\n\tDate after %d Days ",n);

           while(n>0)

              {

                   c=Leap(yy);

                   if(c==1)

                        {

                            m[1]=29;

                        }

                   else

                        {

                            m[1]=28;

                        }

                   n--;

                   dd++;

                   if(dd>m[mm-1])

                        {

                            mm++;

                            dd=1;

                        }

                   if(mm>12)

                        {

                            yy++;

                            mm=1;

                        }

              }

           printf("  %d-%d-%d",dd,mm,yy);

           getch();

      }

 

#include <stdio.h>

#include <conio.h>

#include <stdlib.h>

//Find the Difference between two dates

  int valid(int dd,int mm,int yy,int mn[])

      {

           if(mm>12 || mm<1)

              {

                   return 1;

              }

           if(yy<1)

              {

                   return 1;

              }

           if(dd>mn[mm-1])

              {

                   return 1;

              }

           return 0;

      }

  void main()

   {

       int d,m,y,d1,m1,y1,d2,m2,y2,c;

       int mn[]={31,28,31,30,31,30,31,31,30,31,30,31};

       clrscr();

       printf("\nEnter the First Date dd mm yyyy : ");

       scanf("%d%d%d",&d,&m,&y);

       c=valid(d,m,y,mn);

       if(c==1)

           {

              printf("\n\n\t%d-%d-%d is an invalid date ",d,m,y);

              getch();

              exit(0);

           }

       printf("\nEnter the Second Date dd mm yyyy : ");

       scanf("%d%d%d",&d2,&m2,&y2);

       c=valid(d2,m2,y2,mn);

       if(c==1)

           {

              printf("\n\n\t%d-%d-%d is an invalid date ",d2,m2,y2);

              getch();

              exit(0);

           }

       printf("\n\First Date : %2d-%2d-%4d ",d,m,y);

       printf("\n\t\tSecond Date : %2d-%2d-%4d ",d2,m2,y2);

       if(y>y2)

           {

              printf("\nInvaid Input ");

              getch();

              exit(0);

           }

       d1=d2-d;

       if(d1<0)

           {

              d1=mn[m-1]-d;

              d1=d1+d2;

              m=m+1;

           }

       m1=m2-m;

       if(m1<0)

           {

              m1=12-m;

              m1=m1+m2;

              y=y+1;

           }

       y1=y2-y;

       if(y1<0)

       y1=0;

       printf("\n\t\t\t Difference = %d years %d months and %d days ",y1,m1,d1);

       getch();

  }