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萬年歷

// 已知1980年1月1日是星期二！

#include < iostream.h >

#include < process.h >

#include < string .h >

struct ?Date

{

? int ?year;

? int ?month;

? int ?date;

? int ?day;

? char ?week[ 10 ];

} ;

char ? * dweek[ 7 ] = { " Sun " , " Mon " , " Tues " , " Weds " , " Thur " , " Fri " , " Sat " } ;

Date?showday(Date?pd)

{

? int ?i = 0 ,j = 0 ,k = 0 ,time,score;

?i = (pd.year - 1980 ) * 365 + (pd.year - 1980 ) / 4 - (pd.year - 1980 ) / 100 + (pd.year - 1980 ) / 400 ;

?i = i % 7 + 1 ;

?k = (pd.date - 1 ) % 7 ;?

? if ((pd.year % 100 != 0 ) && (pd.year % 4 == 0 ) || (pd.year % 400 == 0 ))

???? {

????? int ?dday1[ 12 ] = { 31 , 29 , 31 , 30 , 31 , 30 , 31 , 31 , 30 , 31 , 30 , 31 } ;

????? if (pd.month == 2 )???

??? {

????????pd.day = 29 ;

????? if (pd.date > pd.day)

?????????exit( 0 );

???????cout << " 該月的天數為: " << pd.day << endl;???

?????}

????? else

????? {

????pd.day = dday1[pd.month - 1 ];

???? if (pd.date > dday1[pd.month - 1 ])

?????exit( 0 );

????cout << " 該月的天數為: " << pd.day << endl;

???}

???? for (time = 0 ;time < pd.month - 1 ;time ++ )

?????j += dday1[time];

??j = j % 7 ;???

??score = i + j + k + 2 ;

?? if (score < 7 )

????strcpy(pd.week,dweek[score]);?

?? else

?? {

??? while (score >= 7 )

??? {

????score -= 7 ;

???}

??strcpy(pd.week,dweek[score]);?

??} ????

??cout << " 該天的星期數為: " << pd.week << endl;???

??} ?

???? else

???? {

???? int ????dday2[ 12 ] = { 31 , 28 , 31 , 30 , 31 , 30 , 31 , 31 , 30 , 31 , 30 , 31 } ;

?? if (pd.month == 2 )???

??? {

????????pd.day = 28 ;

????? if (pd.date > pd.day)

?????????exit( 0 );

???????cout << " 該月的天數為: " << pd.day << endl;???

?????}

????? else

????? {

????pd.day = dday2[pd.month - 1 ];

???? if (pd.date > dday2[pd.month - 1 ])

?????exit( 0 );

????cout << " 該月的天數為: " << pd.day << endl;

???}

???? for (time = 0 ;time < pd.month - 1 ;time ++ )

?????j += dday2[time];

??j = j % 7 ;???

??score = i + j + k + 2 ;

?? if (score < 7 )

????strcpy(pd.week,dweek[score]);?

?? else

?? {

??? while (score >= 7 )

??? {

????score -= 7 ;

???}

??strcpy(pd.week,dweek[score]);?

??} ????

??cout << " 該天的星期數為: " << pd.week << endl;

??}

return ?pd;

}

void ?main()

{

????Date?obymd;

????obymd.year = 1980 ;

????obymd.month = 1 ;

????obymd.date = 1 ;

????strcpy(obymd.week,dweek[ 2 ]);

????cout << " 請輸入年,月,日: " << " ? " ;

????cin >> obymd.year >> obymd.month >> obymd.date;

????showday(obymd);

}

posted on 2006-05-09 22:03 深邃者閱讀(241) 評論(0) 編輯收藏引用

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