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Source code

#include <stdio.h>
#include <stdlib.h>


#include "date.h"

mdate create_d(unsigned day, unsigned month, unsigned year)
{
	//mdate* date =   (mdate*)malloc(sizeof(mdate));
	mdate date;
	date.day=day;
	date.month=month;
	date.year=year;
	return date;
}

mdate copy_d(mdate d)
{
	return create_d(d.day,d.month,d.year);
}

int datecmp( const mdate *d1, const mdate *d2)
{
	if (d1->year < d2->year)
			return -1;
		if (d1->year > d2->year)
			return 1;
		//year is equal
		if (d1->month < d2->month)
			return -1;
		if (d1->month > d2->month)
			return 1;
		//year and month are equal
		if (d1->day < d2->day)
			return -1;

		if (d1->day > d2->day)
					return 1;
		//the dates are equal
		return 0;
}



void print_d(mdate d)
{
	printf("%u.%u.%u",d.day,d.month,d.year);
}

Source code

#ifndef __DATE_H__
#define __DATE_H__

/* a struct to represent a date! of course there is an existing implementation in the C standard :)
 * */
struct date_{
	unsigned year;
	unsigned month;
	unsigned day;
} ;

typedef struct date_ mdate;

/* creates a date, currently their is no check, whether the given date is valid; 31.02.2000 would make no sense :)
 * */
mdate create_d(unsigned day, unsigned month, unsigned year);

mdate copy_d(mdate d);

/*allows to compare two dates, the function returns
 * 0 if the dates are equal
 * 1 if d1 > d2
 * -1 otherwise
 * */
int datecmp(const mdate *d1, const mdate *d2);

/*prints the date to stdout day.month.year*/
void print_d(mdate d);

#endif