Write a c program to create a structure called date with day, month and year as data member and to find the difference between two dates
Answers
find difference between two date */
#include<stdio.h>
#include<conio.h>
struct dt
{
int dd;
int mm;
int yy;
};
typedef dt date;
void main()
{
date dob,c_date,today;
clrscr();
printf("Enter Date of birth :\n");
printf("Day :");scanf("%d",&dob.dd);
printf("Month :");scanf("%d",&dob.mm);
printf("Year :");scanf("%d",&dob.yy);
printf("\n");
printf("Enter Current date :\n");
printf("Day :");scanf("%d",&c_date.dd);
printf("Month :");scanf("%d",&c_date.mm);
printf("Year :");scanf("%d",&c_date.yy);
/* Diff of two date */
if(c_date.dd>=dob.dd)
today.dd = c_date.dd-dob.dd;
else
{
c_date.dd+=30;
c_date.mm-=1;
today.dd = c_date.dd-dob.dd;
}
if(c_date.mm>=dob.mm)
today.mm = c_date.mm-dob.mm;
else
{
c_date.mm+=12;
c_date.yy-=1;
today.mm = c_date.dd-dob.mm;
}
today.yy = c_date.yy-dob.yy;
printf("Current date is : ");
printf("%2d-%2d-%4d\n\n",c_date.dd,c_date.mm,c_date.yy);
printf("Date of Birth : ");
printf("%2d-%2d-%4d\n\n",dob.dd,dob.mm,dob.yy);
printf("Today your age: \n");
printf("Day : %d\n",today.dd);
printf("Month : %d\n",today.mm);
printf("Year : %d\n",today.yy);
getch();
}
Program to create a structure called date with day, month and year as data member and to find the difference between two dates
Explanation:
#include<stdio.h> // include stdio.h library
#include<stdlib.h> // include stdlib.h library
int valid_date(int date, int mon, int year);
int main(void)
{
int day1, mon1, year1,
day2, mon2, year2;
int day_diff, mon_diff, year_diff;
printf("Enter start date (MM/DD/YYYY): ");
scanf("%d/%d/%d", &mon1, &day1, &year1);
printf("Enter end date (MM/DD/YYYY): ");
scanf("%d/%d/%d", &mon2, &day2, &year2);
if(!valid_date(day1, mon1, year1))
{
printf("First date is invalid.\n");
}
if(!valid_date(day2, mon2, year2))
{
printf("Second date is invalid.\n");
exit(0);
}
if(day2 < day1)
{
// borrow days from february
if (mon2 == 3)
{
// check whether year is a leap year
if ((year2 % 4 == 0 && year2 % 100 != 0) || (year2 % 400 == 0))
{
day2 += 29;
}
else
{
day2 += 28;
}
}
// borrow days from April or June or September or November
else if (mon2 == 5 || mon2 == 7 || mon2 == 10 || mon2 == 12)
{
day2 += 30;
}
// borrow days from Jan or Mar or May or July or Aug or Oct or Dec
else
{
day2 += 31;
}
mon2 = mon2 - 1;
}
if (mon2 < mon1)
{
mon2 += 12;
year2 -= 1;
}
day_diff = day2 - day1;
mon_diff = mon2 - mon1;
year_diff = year2 - year1;
printf("Difference: %d years %02d months and %02d days.", year_diff, mon_diff, day_diff);
return 0; // return 0 to operating system
}
// function to check whether a date is valid or not
int valid_date(int day, int mon, int year)
{
int is_valid = 1, is_leap = 0;
if (year >= 1800 && year <= 9999)
{
// check whether year is a leap year
if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
{
is_leap = 1;
}
// check whether mon is between 1 and 12
if(mon >= 1 && mon <= 12)
{
// check for days in feb
if (mon == 2)
{
if (is_leap && day == 29)
{
is_valid = 1;
}
else if(day > 28)
{
is_valid = 0;
}
}
// check for days in April, June, September and November
else if (mon == 4 || mon == 6 || mon == 9 || mon == 11)
{
if (day > 30)
{
is_valid = 0;
}
}
// check for days in rest of the months
// i.e Jan, Mar, May, July, Aug, Oct, Dec
else if(day > 31)
{
is_valid = 0;
}
}
else
{
is_valid = 0;
}
}
else
{
is_valid = 0;
}
return is_valid;
}