C++问题 定义一个类，用于输入并验证日期

求高手详细给出程序，先谢谢，急用！

#include "iostream.h"
class date
{
public:
date();
date(date &d);
int setdate(int y, int m, int d);
inline int getyear(){return year;}
inline int getmonth(){return month;}
inline int getday(){return day;}
private:
int Reasonable(int y, int m, int d);
int year;
int month;
int day;
};

class qdate : public date
{
public:
int Query();
};

date::date()
{
year=1900; month=1; day=1;
}

date::date(date &d)
{
year=d.getyear(); month=d.getmonth(); day=d.getday();
}

int date::setdate(int y, int m, int d)
{
switch (Reasonable(y,m,d))
{
case 1:
printf("month is wrong! Retry, format yyyy-mm-dd:");
return 0;
case 2:
printf("day is wrong! Retry, format yyyy-mm-dd:");
return 0;
}
year=y; month=m; day=d;
return 1;
}

int date::Reasonable(int y, int m, int d)
{
int count[]={31,28,31,30,31,30,31,31,30,31,30,31};
int status=0;
if(m<1 || m>12) status=1;
if((y%4==0&&y%100!=0)||(y%400==0) && m==2) count[1]++;
if(d<1 || d>count[m-1]) status=2;
return status;
}

int qdate::Query()
{
int d=getday(),m=getmonth(),y=getyear();
if(m<3) m+=12;
return (d+2*m+3*(m+1)/5+y+y/4-y/100+y/400)%7;
}

void main()
{
char str[7][10]={"Monday","Tuesday","Wednesday","Thirsday","Friday","Saturday","Sunday"};
int d,m,y;
qdate week;
printf("Input date, format yyyy-mm-dd:");
do
{
scanf("%d-%d-%d",&y,&m,&d);
}
while(!week.setdate(y,m,d));
printf("%04d-%02d-%02d is %s",y,m,d,str[week.Query()]);
}

就是验证数据是否为日期类型

#include #include typedef struct date { int year; int month; int day; }date; int getday(date date1, date date2) { // 1 2 3 4 5 6 7 8 9 10 11 int mon[11]={31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30}; int i; long temp1=date1.day, temp2=date2.day;//day for(i=date1.month-2; i>=0; i--) { temp1+=mon[i]; } for(i=date2.month-2; i>=0; i--) { temp2+=mon[i]; }//month temp1+=((date1.year-1)*365)+(date1.year/4); temp2+=((date2.year-1)*365)+(date2.year/4);//year return temp2-temp1; } void main() { date date1, date2; date1.year=2010; date1.month=5; date1.day=20; date2.year=2011; date2.month=5; date2.day=25; printf("这两个日期之间的天数为：%d", getday(date1, date2)); getch(); } 这里 算法很巧妙，符合我的风格 不过有很多漏洞的，比如日期的格式，还有计算两个日子之间的天数可能有负数 建议使用面向对象的思想