For a better understanding, we always recommend you to learn the basic topics of C programming listed below:
In this c program, we need to change the number of days into the format of years, weeks, and days. That means if the user has input 372 days, the output of the c program should be 1 year and 1 week like that. Here we need to convert the number of days into years and the remaining days into weeks and days.
In this c program, we use the mod operator to find the remainder of the year and week. First, we define the number of days in a week as 7. After accepting the user input, for finding years, we divide the number of days by 365. To calculate the remaining weeks, use mod the number with 365 and divide that remainder with 7. Like that, we have to find out the days also. Step by step procedure that happens in this program is:
#define is used to Declare the constant values in our program. Here we define the Constant DAYINWEEK; its value is 7. We can use the Constant 'DAYINWEEK' in this example to calculate the Week, Days, etc.
The Syntax for defining a Constant is:
#define ConstantName Value
STEP 1: Include the Header files to use the built-in Functions in the C program.
STEP 2: Declare the variables 'ndays, Year, week, days' as integer and Define DAYSINWEEK 7.'
STEP 3: Read the number of Days into 'ndays'.
STEP 4: Calculate Year as 'ndays/365'.
STEP 5: Calculate Week as '(ndays % 365)/DAYSINWEEK'.
STEP 6: Calculate Days as '(ndays65) % DAYSINWEEK'.
STEP 7: Display 'ndays' is equivalent to 'year' and 'week' and 'days' using the printf function.
#include <stdio.h>
#define DAYSINWEEK 7
void main()
{
int ndays, year, week, days;
printf("Enter the number of days\n");
scanf("%d", & ndays);
year = ndays / 365;
week = (ndays % 365) / DAYSINWEEK; /* calculating the years, weeks and days */
days = (ndays% 365) % DAYSINWEEK;
printf("%d is equivalent to %d years, %d weeks and %d days\n", ndays, year, week, days);
}
Enter the number of days 375 375 is equivalent to 1 year, 1 week and 3 days Enter the number of days 423 423 is equivalent to 1 year, 8 weeks, and 2 days Enter the number of days 1497 1497 is equivalent to 4 years, 5 weeks and 2 days
