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  1. //#include "stdafx.h"
  2. #include <iostream> 
  3. #include <assert.h>
  4.     using namespace std;
  5. class calendar {
  6.     private:
  7.         int year;
  8.     int month;
  9.     int day;
  10.     public:
  11.         calendar(int = 0, int = 0, int = 0);
  12.     ~calendar();
  13.     calendar operator += (calendar & );
  14.     calendar operator -= (calendar & );
  15.     calendar operator = (calendar & );
  16.     calendar operator != (calendar & );
  17.     calendar operator > (calendar & );
  18.     calendar operator < (calendar & );
  19.     calendar operator >= (calendar & );
  20.     calendar operator <= (calendar & );
  21.     calendar operator == (calendar & );
  22.     friend istream & operator >> (istream & , calendar & );
  23.     friend ostream & operator << (ostream & , calendar & );
  24. };
  25. calendar::calendar(int y, int m, int d) {
  26.     year = y;
  27.     month = m;
  28.     day = d;
  29. }
  30. calendar calendar::operator = (calendar & y) {
  31.     return (year = y.year,
  32.         month = y.month,
  33.         day = y.day);
  34. }
  35. calendar calendar::operator += (calendar & y) {
  36.     year = y.year + year;
  37.     month = y.month + month;
  38.     if (month > 12) {
  39.         year++;
  40.         month = month - 12;
  41.     }
  42.     day =
  43.         y.day +
  44.         day;
  45.     if (month == 1 || month == 3 || month == 5 || month == 7 || month == 9 ||
  46.         month == 11) {
  47.         if (day > 31) {
  48.             month++;
  49.             day = day - 31;
  50.         }
  51.     }
  52.     if (
  53.         month == 4 || month == 6 || month == 8 || month == 10 || month == 12) {
  54.         if (day > 30) {
  55.             month++;
  56.             day = day - 30;
  57.         }
  58.     }
  59.     if (
  60.         month == 2) {
  61.         if (day > 28) {
  62.             month++;
  63.             day = day - 28;
  64.         }
  65.     }
  66.     return calendar(year, month, day);
  67. }
  68. calendar calendar::operator -= (calendar & y) {
  69.     year = y.year - year;
  70.     month = y.month - month;
  71.     if (month < 1) {
  72.         year--;
  73.         month = month + 12;
  74.     }
  75.     day =
  76.         y.day -
  77.         day;
  78.     if (month == 1 || month == 5 || month == 7 || month == 9 || month == 11) {
  79.         if (day < 1) {
  80.             month--;
  81.             day = day + 30;
  82.         }
  83.     }
  84.     if (
  85.         month == 2 || month == 4 || month == 6 || month == 8 || month == 10 ||
  86.         month == 12) {
  87.         if (day < 1) {
  88.             month--;
  89.             day = day + 31;
  90.         }
  91.     }
  92.     if (
  93.         month == 3) {
  94.         if (day < 1) {
  95.             month--;
  96.             day = day + 28;
  97.         }
  98.     }
  99.     return calendar(year, month, day);
  100. }
  101. calendar calendar::operator != (calendar & y) {
  102.     if (year != y.year) {
  103.         cout << "rizni daty " << endl;
  104.     } else {
  105.         if (month != y.month) {
  106.             cout << "rizni daty " << endl;
  107.         } else {
  108.             if (day != y.day) {
  109.                 cout << "rizni daty " << endl;
  110.             } else {
  111.                 cout << "Error. Odnakovi daty" << endl;
  112.             }
  113.         }
  114.     }
  115.     return calendar(year, month, day);
  116. }
  117. calendar calendar::operator == (calendar & y) {
  118.     if (year != y.year) {
  119.         cout << "Error. Rizni daty " << endl;
  120.     } else {
  121.         if (month != y.month) {
  122.             cout << "Error. Rizni daty " << endl;
  123.         } else {
  124.             if (day != y.day) {
  125.                 cout << "Error. Rizni daty " << endl;
  126.             } else {
  127.                 cout << "Odnakovi daty" << endl;
  128.             }
  129.         }
  130.     }
  131.     return calendar(year, month, day);
  132. }
  133. calendar calendar::operator < (calendar & y) {
  134.     if (year > y.year) {
  135.         cout << "Error. First date is 'bigger' " << endl;
  136.     }
  137.     if (
  138.         year < y.year) {
  139.         cout << "First date is lower" << endl;
  140.     }
  141.     if (
  142.         year == y.year) {
  143.         if (month > y.month) {
  144.             cout << "Error. First date is 'bigger' " << endl;
  145.         }
  146.         if (
  147.             month < y.month) {
  148.             cout << "First date is lower" << endl;
  149.         }
  150.         if (
  151.             month == y.month) {
  152.             if (day > y.day) {
  153.                 cout << "Error. First date is 'bigger' " << endl;
  154.             }
  155.             if (
  156.                 day < y.day) {
  157.                 cout << "First date is lower" << endl;
  158.             }
  159.             if (
  160.                 day == y.day) {
  161.                 cout << "Error. Odnakovi daty" << endl;
  162.             }
  163.         }
  164.     }
  165.     return calendar(year, month, day);
  166. }
  167. calendar calendar::operator > (calendar & y) {
  168.     if (year > y.year) {
  169.         cout << "First date is 'bigger' " << endl;
  170.     }
  171.     if (
  172.         year < y.year) {
  173.         cout << "Error.First date is lower" << endl;
  174.     }
  175.     if (
  176.         year == y.year) {
  177.         if (month > y.month) {
  178.             cout << "First date is 'bigger' " << endl;
  179.         }
  180.         if (
  181.             month < y.month) {
  182.             cout << "Error. First date is lower" << endl;
  183.         }
  184.         if (
  185.             month == y.month) {
  186.             if (day > y.day) {
  187.                 cout << "First date is 'bigger' " << endl;
  188.             }
  189.             if (
  190.                 day < y.day) {
  191.                 cout << "Error. First date is lower" << endl;
  192.             }
  193.             if (
  194.                 day == y.day) {
  195.                 cout << "Error. Odnakovi daty" << endl;
  196.             }
  197.         }
  198.     }
  199.     return calendar(year, month, day);
  200. }
  201. calendar calendar::operator <= (calendar & y) {
  202.     if (year > y.year) {
  203.         cout << "Error. First date is 'bigger' " << endl;
  204.     }
  205.     if (
  206.         year < y.year) {
  207.         cout << "First date is lower" << endl;
  208.     }
  209.     if (
  210.         year == y.year) {
  211.         if (month > y.month) {
  212.             cout << "Error. First date is 'bigger' " << endl;
  213.         }
  214.         if (
  215.             month < y.month) {
  216.             cout << "First date is lower" << endl;
  217.         }
  218.         if (
  219.             month == y.month) {
  220.             if (day > y.day) {
  221.                 cout << "Error. First date is 'bigger' " << endl;
  222.             }
  223.             if (
  224.                 day < y.day) {
  225.                 cout << "First date is lower" << endl;
  226.             }
  227.             if (
  228.                 day == y.day) {
  229.                 cout << "Odnakovi daty" << endl;
  230.             }
  231.         }
  232.     }
  233.     return calendar(year, month, day);
  234. }
  235. calendar calendar::operator >= (calendar & y) {
  236.     if (year > y.year) {
  237.         cout << "First date is 'bigger' " << endl;
  238.     }
  239.     if (
  240.         year < y.year) {
  241.         cout << "Error.First date is lower" << endl;
  242.     }
  243.     if (
  244.         year == y.year) {
  245.         if (month > y.month) {
  246.             cout << "First date is 'bigger' " << endl;
  247.         }
  248.         if (
  249.             month < y.month) {
  250.             cout << "Error. First date is lower" << endl;
  251.         }
  252.         if (
  253.             month == y.month) {
  254.             if (day > y.day) {
  255.                 cout << "First date is 'bigger' " << endl;
  256.             }
  257.             if (
  258.                 day < y.day) {
  259.                 cout << "Error. First date is lower" << endl;
  260.             }
  261.             if (
  262.                 day == y.day) {
  263.                 cout << "Odnakovi daty" << endl;
  264.             }
  265.         }
  266.     }
  267.     return calendar(year, month, day);
  268. }
  269. istream & operator >> (istream & is, calendar & x) {
  270.     char c;
  271.     cout << "vveditj datu:" << endl;
  272.     cin >> x.year;
  273.     cin >> c;
  274.     assert(c == '.');
  275.     cin >> x.month;
  276.     cin >> c;
  277.     assert(c == '.');
  278.     cin >> x.day;
  279.     return is;
  280. }
  281. ostream & operator << (ostream & os, calendar & x) {
  282.     cout << "date:" << endl;
  283.     os << x.year << '.' << x.month << '.' << x.day << endl;
  284.     return os;
  285. }
  286. calendar::~calendar() {}
  287. int main(int argc, char * * argv) {
  288.     calendar a(1999, 12, 9);
  289.     calendar b(2000, 6, 20);
  290.     cin >> b;
  291.     cout << b << endl;
  292.     a += b;
  293.     cout << "addition " << a << endl;
  294.     a > b;
  295.     return 0;
  296. }
Success #stdin #stdout 0s 4324KB
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stdin
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1998.8.11
stdout
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vveditj datu:
date:
1998.8.11

addition date:
3998.8.20

First date is 'bigger'
https://ideone.com/uuByG5
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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