Date calculation --- C ++

Date calculation --- C ++

# Define _ CRT_SECURE_NO_WARNINGS 1 # include <iostream> # include <assert. h> using namespace std; class Date {public: void display () {cout <_ year <"-" <_ month <"-" <_ day <endl;} bool IsLeapyear (int year) {return (year/400 = 0) | (year/4 = 0 & year/100! = 0);} int GetMonthDay (int year, int month) {if (month> 12 | month <1) {printf ("None this month \ n "); return-1;} else {int dayarr [] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31 }; if (IsLeapyear (year) & month = 2) {return 29;} else {return dayarr [month-1] ;}} Date & operator + (const int day) {if (day <0) {return * this-(-day);} else {_ day + = day; while (_ day> GetMonthDay (_ year, _ month )) {_ day-= GetMonthDay (_ yea R, _ month); if (_ month = 12) {_ year + = 1; _ month = 1;} else {_ month + = 1 ;}}} return * this;} Date & operator-(int day) {if (day <0) {return * this + (-day);} else {_ day-= day; while (_ day <= 0) // when the value is equal to {if (_ month = 1) {_ year-= 1; _ month = 12 ;} else {_ month-= 1;} _ day + = GetMonthDay (_ year, _ month) ;}} return * this;} Date operator ++ (int day) // Add {Date tem = * this; * this = * this + 1; return tem;} Date & operator ++ ()/ /Add {* this = * this + 1; return * this;} Date & operator -- (int day) to the front minus {Date tem = * this; * this = * this-1; return tem;} Date & operator -- () // minus {* this = * this-1; return * this ;} date & operator + = (const int day) {* this = * this + day; return * this;} Date & operator-= (const int day) {* this = * this-day; return * this;} bool operator> (const Date & cur) {if (_ year> cur. _ year) {return 1;} else if (_ year = cur. _ year ){ If (_ month> cur. _ month) {return 1;} else if (_ month = cur. _ month) {if (_ day> cur. _ day) {return 1 ;}}return 0 ;}bool operator ==( const Date & cur) {if (_ year = cur. _ year & _ month = cur. _ month & _ day = cur. _ day) {return 1 ;}else {return 0 ;}} bool operator <(const Date & cur) {if (! (* This> cur | * this = cur) {return 1 ;}else {return 0 ;}} bool operator >=( const Date & cur) {if (* this> cur | * this = cur) {return 1 ;}else {return 0 ;}} bool operator <= (const Date & cur) {if (* this <cur | * this = cur) {return 1 ;}else {return 0 ;}} int operator-(const Date & cur) {int count = 0; Date max; Date min; if (* this> cur) {max = * this; min = cur;} else if (* this <cur) {max = cur; min = * this;} else {return 0 ;}while (1) {if (min = max) {return count ;}else {min = min + 1; count ++ ;}} public: date (int year = 1990, int month = 1, int day = 1): _ year (year), _ month (month), _ day (day) {} Date (const Date & a): _ year (. _ year), _ month (. _ month), _ day (. _ day ){}~ Date () {} Date & operator = (const Date & cur) {_ year = cur. _ year; _ month = cur. _ month; _ day = cur. _ day; return * this;} private: int _ year; int _ month; int _ day ;}; // operator + operator-// operator ++ operator -- // operator + = operator-= void test1 () {Date cur (2015, 11, 11 ); // (cur + 18 ). display (); // (cur + 19 ). display (); // (cur + 20 ). display (); // (cur + (-30 )). display (); // (cur-10 ). display (); // (cur-11 ). display (); // (cur-12 ). display (); // (cur-(-18 )). display () ;}// operator ><===void test2 () {Date cur1 (2015, 11, 13); Date cur2 (2015, 11, 12); cout <(cur1> cur2) <endl; cout <(cur1 = cur2) <endl ;}// operator-(const Date & cur) void test3 () {Date date1 (2015, 11, 11); Date date2 (2015, 11, 1); Date date3 (2015, 11, 22 ); cout <date1-date2 <endl; cout <date1-date3 <endl;} int main () {// test1 (); // test2 (); test3 (); system ("pause"); return 0 ;}