/*==============================================================================
             _ ____        _____          __  __
            (_)  _ \ ___  |_   _|__  __ _|  \/  |
            | | |_) / __|   | |/ _ \/ _` | |\/| |
            | |  __/\__ \   | |  __/ (_| | |  | |
            |_|_|   |___/   |_|\___|\__,_|_|  |_|
 
               [iPs] Saber dia da Semana
                Criado por: [iPs]DraKiNs (agradecimentos a Crush)
                    Versão 0.1
==============================================================================*/
 
#include <stdio.h>
 
main()
{
	system("title [iPs TeaM] - Que dia da semana?");
	system("color 8f");
 
	int
		day	= 0,
		month	= 0,
		year	= 0;
 
	// ==== [ Dia ] ========
	printf("Digite o dia: ");
	scanf("%d", &day);
 
	// ==== [ Mês ] ========
	printf("Digite o mês: ");
	scanf("%d", &month);
 
	// ==== [ Ano ] ========
	printf("Digite o ano: ");
	scanf("%d", &year);
 
	// ==== [ Processar ] ========
 
	char	sStr[24] 	= 	("Dia Invalido");
	int   
		iBissext	=	(year % 100),
		iWeekDay	=	(year / 100);
 
	if(month < 3) month += 12,year--;
	int iWeek = ((day + (month+1)*26/10 + iBissext + iBissext/4 + iWeekDay/4 - 2*iWeekDay) % 7);
 
	if(iWeek == 0) strcpy(sStr , ("Sábado"));
	if(iWeek == 1) strcpy(sStr , ("Domingo"));
	if(iWeek == 2) strcpy(sStr , ("Segunda"));
	if(iWeek == 3) strcpy(sStr , ("Terça"));
	if(iWeek == 4) strcpy(sStr ,  ("Quarta"));
	if(iWeek == 5) strcpy(sStr ,  ("Quinta")) ;
	if(iWeek == 6) strcpy(sStr ,  ("Sexta")); 
 
	printf("O dia da semana desta data foi %s \n",sStr);
	return system("pause");
}