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Find the last Sunday of each month: Difference between revisions

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Find the last Sunday of each month (view source)

Revision as of 18:03, 22 May 2016

539 bytes removed ,  8 years ago
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=={{header|C}}==
Identical to [[Last_Friday_of_each_month#C|Last Friday of each month]] except for the initial day offset.
{{incorrect|C|It can produce different results depending on the time of day that it is run (amongst other issues).}}
 
<lang C>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
 
int main(int argc, char *argv[])
#define NUM_MONTHS 12
 
void LastSundays(int year)
{
int days[] = {31,2829,31,30,31,30,31,31,30,31,30,31};▼
time_t t;
struct tm* datetime int m, y, w;
 
if (argc < 2 || (y = atoi(argv[1])) <= 1752) return 1;
int sunday=0;
isLeapYear days[1] -= (yeary % 4==0) || (!(yeary % 100==0) && (yeary % 400==0)));▼
int dayOfWeek=0;
w = y * 365 + 97 * (y - 1) / 400 + 4;
int month=0;
int monthDay=0;
int isLeapYear=0;
int daysInMonth[NUM_MONTHS]={
▲ 31,28,31,30,31,30,31,31,30,31,30,31
};
 
▲ isLeapYear=(year%4==0 || ((year%100==0) && (year%400==0)));
 
if(isLeapYear)
{
daysInMonth[1]=29;
}
 
time(&t);
datetime = localtime(&t);
datetime->tm_year=year-1900;
for(month=0; month<12;month++)▼
{
datetime->tm_mon=month;
monthDay=daysInMonth[month];
datetime->tm_mday=monthDay;
 
t = mktime(datetime);
dayOfWeek=datetime->tm_wday;
 
while(dayOfWeek!=sunday)
{▼
monthDay--;
datetime->tm_mday=monthDay;
t = mktime(datetime);▼
dayOfWeek=datetime->tm_wday;
 
▲ for(monthm = 0; monthm < 12;month m++) {
▲ t w = mktime(datetimew + days[m]) % 7;
printf("%d-%02d-%02dd\n",year y,month m + 1,monthDay);▼
days[m] + (w < 5 ? -2 : 5) - w);
}
▲ printf("%d-%02d-%02d\n",year,month+1,monthDay);
}
 
▲ {return 0;
}
 
int main()
{
LastSundays(2013);
return 0;
}
 
</lang>
 
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