自己写的一个小程序
程序代码：#include <iostream>
using namespace std;
int g_Month[12] = {31,28,31,30,31,30,31,31,30,31,30,31};//月份
int g_WeenDay[7] = {1,2,3,4,5,6,7}; //星期
int g_iYear = 2000 , g_iMonth = 1 , g_iDay = 1 , g_iWeenDay = 6;//初始化2000年1月1日为星期六;
class cDateTime
{
private:
int M_Year;
int M_Month;
int M_Day;
int M_DayNum;//相隔的天数
int M_YearNum;//一年的天数
public:
cDateTime();
void SetInfo(int iYear , int iMonth , int iDay);
void bRunYear(int iYear);
void iYearCount(int iYear = g_iYear , int iMonth = g_iMonth , int iDay = g_iDay);
int WeenDay(int iTmp);
void fDay();//某个月第一天是星期几
void sDay();//两个时间相隔多少天
void nDay();//某一天的下一天是几号
void wDay(int iWeenDay);//求某年某月的第几周是哪几天
};
cDateTime::cDateTime()
{
M_Year = 0;
M_Month = 0;
M_Day = 0;
M_DayNum = 0;
}
void cDateTime::SetInfo(int iYear , int iMonth , int iDay)
{
M_Year = iYear;
M_Month = iMonth;
M_Day = iDay;
}
void cDateTime::bRunYear(int iYear)
{
if (iYear % 4 == 0 && iYear % 100 != 0 || iYear % 100 ==0 && iYear % 400 ==0)
{
g_Month[1] = 29;
M_YearNum = 366;
}
else
{
g_Month[1] = 28;
M_YearNum = 365;
}
}
void cDateTime::iYearCount(int iYear , int iMonth , int iDay)//总共的天数
{
//int iDayNum = 0;
for (int i = iYear; i < M_Year; ++i)
{
bRunYear(i);
M_DayNum += M_YearNum;
}
bRunYear(M_Year);
for (i = 0; i < M_Month - 1; ++i)
{
M_DayNum += g_Month[i];
}
M_DayNum += M_Day;
////////////////开始计算多出来的天数//////////////////
bRunYear(iYear);
if (iMonth > 1)
{
for (i = 0; i < iMonth - 1; ++i)
{
M_DayNum -= g_Month[i];
}
}
if (iDay > 1)
{
M_DayNum -= iDay;
++M_DayNum;
}
/////////////////减掉多出来的天数/////////////////////
}
int cDateTime::WeenDay(int iTmp)
{
int iTmpDay = 1 , iTmpWeenday = g_iWeenDay - 1 , Tmp;
while (iTmpDay <= iTmp)
{
if (iTmpWeenday > 6)
{
iTmpWeenday = 0;
}
Tmp = g_WeenDay[iTmpWeenday];
++iTmpWeenday;
++iTmpDay;
}
return Tmp;
}
void cDateTime::fDay()
{
cout << M_Year << "年" << M_Month << "月的第1天是星期" << WeenDay(M_DayNum) << endl;
}
void cDateTime::sDay()
{
cout << "您输入的这两个日期相差" << M_DayNum - 1 << "天" << endl;
}
void cDateTime::nDay()
{
bRunYear(M_Year);
++M_Day;
if (M_Day > g_Month[M_Month - 1])
{
M_Day = 1;
}
cout << "您输入的日期下一天为：" << M_Day << "号" << endl;
}
void cDateTime::wDay(int iWeenDay)
{
int iTmp = 0;
for (int i = 0; i < g_Month[M_Month - 1]; ++i)
{
if (WeenDay(M_DayNum + i) == 1)//第一个周开始
{
++iTmp;
}
if (iTmp==iWeenDay)
{
cout << "第" << iWeenDay << "周有：" << i+1 << " " << endl;
}
}
}
int main()
{
int iYear , iMonth;
cDateTime Fist;
cout << "求某个月的第一天是星期几" << endl;
cout << "请输入年：";
cin >> iYear;
cout << "请输入月：";
cin >> iMonth;
Fist.SetInfo(iYear , iMonth , 1);
Fist.iYearCount();
Fist.fDay();
cout << "-------------------黄金分割线----------------------------" << endl;
int StarYear , StarMonth , StarDay , LastYear , LastMonth , LastDay;
cDateTime Second;
cout << "求两个时间相隔多少天" << endl;
cout << "请输入起始年：";
cin >> StarYear;
cout << "请输入起始月：";
cin >> StarMonth;
cout << "请输入起始日：";
cin >> StarDay;
cout << "请输入结束年：";
cin >> LastYear;
cout << "请输入结束月：";
cin >> LastMonth;
cout << "请输入结束日：";
cin >> LastDay;
Second.SetInfo(LastYear , LastMonth , LastDay);
Second.iYearCount(StarYear , StarMonth , StarDay);
Second.sDay();
cout << "-------------------黄金分割线----------------------------" << endl;
cDateTime Again;
cout << "求某天的下一天是几号" << endl;
cout << "请输入年：";
cin >> StarYear;
cout << "请输入月：";
cin >> StarMonth;
cout << "请输入日：";
cin >> StarDay;
Again.SetInfo(StarYear , StarMonth , StarDay);
Again.nDay();
cout << "-------------------黄金分割线----------------------------" << endl;
cDateTime Four;
cout << "求某年某月的第几周是哪几天" << endl;
cout << "请输入年：";
cin >> StarYear;
cout << "请输入月：";
cin >> StarMonth;
cout << "请输入第几周：";
cin >> StarDay;
Four.SetInfo(StarYear , StarMonth , 1);
Four.iYearCount();
Four.wDay(StarDay);
return 0;
}
