How can i display on screen calendar of year in c

Question

in python we do
import calendar
cal = calendar.calendar(2018)
print(cal)
this will display it all from jan to dec

Answer 1

By using `struct tm`¹ structure from <time.h> as follow

// Get the current system time
time_t rawTime = time(NULL);

// Instantiating a pointer to `struct tm` structure using the current time
// 1. for getting the local system time
struct tm *local_now = localtime(&rawTime);

// 2. for getting the Greenwich mean time
struct tm *greenwich_now = gmtime(&rawTime);

// Retrieving each member object and printing out in a formatted fashion
// For local time
printf("%d/%d/%d", local_now -> tm_mon+1,
local_now -> tm_mday,
local_now -> tm_year + 1900);

Output for today:
11/18/2018

NOTE: In online-sandboxed compilers, `localtime` and `gmtime` yield the same result.

EDIT_1: To reliably print the name of the month instead of the number, constructing a lookup table would be an easy solution.

char *m_name[] = {"Jan", "Feb", ... , "Dec"};
...
printf(..., m_name[local_now -> tm_mon], ...);

EDIT_2: This just addresses the core element of a calendar system. In other words, it would be the baseline for constructing your own calendar
_____
¹ https://en.cppreference.com/w/c/chrono/tm

Answer 2

A search in codeplayground delivered this beaut by Ace
https://code.sololearn.com/ceEVvt3R0P7i/?ref=app

Answer 3

thanks bro