test.m

// test.m: test calendar code
// Compile with: gcc -Wall -framework Foundation test.m -o test

#import <Foundation/Foundation.h>

NSString *ChineseYear(int year)
{
    const char *tiangan[] = { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };
    const char *dizhi[] = { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" };
    char buffer[10];

    sprintf(buffer, "%s%s", tiangan[(year - 1) % 10], dizhi[(year - 1) % 12]);
    return [NSString stringWithUTF8String: buffer];
}

NSString *ChineseMonth(int month)
{
    const char *months[] = { "正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "冬", "腊" };

    return [NSString stringWithUTF8String: months[(month - 1) % 12]];
}

NSString *ChineseDay(int day)
{
    const char *digits[] = { "一", "二", "三", "四", "五", "六", "七", "八", "九", "十" };
    char buffer[10];

    if (day <= 10)
        sprintf(buffer, "初%s", digits[day - 1]);

    else if (day > 10 && day < 20)
        sprintf(buffer, "十%s", digits[(day - 1) % 10]);

    else if (day == 20 || day == 30)
        sprintf(buffer, "%s十", digits[day / 10]);

    else if (day > 20 && day < 30)
        sprintf(buffer, "廿%s", digits[(day - 1) % 10]);

    return [NSString stringWithUTF8String: buffer];
}

int main(int argc, char *argv[])
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSCalendar *chinese = [[NSCalendar alloc] initWithCalendarIdentifier: NSChineseCalendar];
    unsigned unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit;
    NSDate *date = [NSDate date];
    NSDateComponents *comps = [chinese components:unitFlags fromDate:date];

    NSLog(@"comps: %@年%@月%@",
            ChineseYear([comps year]),
            ChineseMonth([comps month]),
            ChineseDay([comps day]));

    [chinese release];
    [pool release];
    return 0;
}