cplusplus/chrono.cpp at master · jingar/cplusplus · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
#include "chrono.h"

namespace chrono
{
  Date::Date(int yy,Month mm, int dd)
    :y(yy),m(mm),d(dd)
  {
    if(!is_date(yy,mm,dd))
      {
        throw Invalid();
      }
  }
  Date& default_date()
  {
    static Date dd(2001,Date::jan,1);
    return dd;
  }

  Date::Date()
    :y(default_date().year()),m(default_date().month()),d(default_date().day())
  {
  }

  // void Date::add_day(int n)
  // {
  // }

  // void Date::add_month(int n)
  // {
  // }

  void Date::add_year(int n)
  {
    if(m == feb && d == 29 && !leapyear(y+n))
      {
        m = mar;
        d = 1;
      }
    y+=n;
  }

  boo is_date(int y, Date::Month m, int d)
  {
    // assume that y is valid

    if(d<=0) // day must be positive
      {
        return false;
      }
    int days_in_month = 31; // most months have 31 days
    switch(m)
      {
      case Date::feb:
        days_in_month = (leapyear(y))?29:28;  // if year is leapyear then 29 otherwise 28
        break;
      case Date::apr: case Date::jun: case Date::sep: case Date::nov:
        days_in_month = 30; // if any of theese months, make it equal to 30 days
        break;
      }
    if(d > days_in_month)
      {
        return false;
      }
    return true;
  }

  // bool leapyear(int y)
  // {
  //   return true; // for now
  // }

  bool operator==(const Date& a, const Date& b)
  {
    // check if the year months and days match
    return a.year == b.year() && a.month() == b.month() && a.day() == b.day();
  }

  bool operator!=(const Date& a, const Date& b)
  {
    return !(a==b);
  }

  ostream& operator<<(ostream& os,const Date& d)
  {
    return os << '(' << d.year() << ',' << d.month() << ',' << d.day() << ')';
  }

  istream& operator>>(istream& is, Date& dd)
  {
    int y,m,d;
    char ch1, ch2, ch3, ch4;
    is >> ch1 >> y >> ch2 >> m >> ch3 >> d >> ch4;
    if(!is)
      {
        retunr is;
      }
    if(ch1! = '(' || ch2 != ',' || ch3 != ',' || ch4 != ')')
      {
        is.clear(ios_base::failbit);
        return is;
      }
    return is;
  }

  enum Day
    {
      sunday,monday,tuesday,wednesday,thursday,friday,saturday
    };

  // Day day_of_week(const Date& d)
  // {

  // }
  // Day next_sunday(const Date& d)
  // {

  // }

  // Day next_weekday(const Date& d)
  // {

  // }
}