Date Counter-c++ implementation __c++

Date Counter implementation: Define the date class in the program: Class date{}; The main use of operator overload knowledge in which to implement: date plus or minus a certain number of days, date minus the date difference days, the two dates of various comparisons and date input and output functions.

Specific code implementation:

#include <iostream> #include <cstdlib> using namespace std;
	Class Data {friend ostream& operator<< (ostream& _cout, const data& D);
Friend istream& operator>> (istream& _cin, data& D); Public:data (const int YEAR=1900,CONST int Month=1,const int day=1): _year (year), _month (month), _day (day) {} Dat
		A (const data& Data) {_year=data._year;
		_month=data._month;
	_day=data._day;    ~data () {} int getdaysinmonth (int year,int month);       Gets the number of days per month in bool Isleapyear (int year);       Judging leap year bool Isvalidata ();    
	Determine whether the date is legal data & operator = (const data &d);
	Data operator+ (int day);
	Data operator-(int day);
	int operator-(const Data &d);
	Data &operator-();
	Data operator-(int);
	Data &operator + + ();
	Data operator + + (int);
	BOOL operator > (const Data &d);
	BOOL operator < (const Data &d);
	BOOL operator >= (const Data &d);
	BOOL operator <= (const Data &d); BOOL OperAtor = = (const Data &d);
BOOL operator!= (const Data &d);
	Private:int _year;
	int _month;
int _day;

}; BOOL Data::isleapyear (int year)//judging leap years {return (year%4==0) && (year%100!=0)) | |
(year%400==0) True:false; BOOL Data::isvalidata ()//Determine whether the date is valid {if (_year>=1900) && ((_month>0) && (_month<13) &am
	p;& (_day<=getdaysinmonth (_year,_month)) && (_day>0)) {return true;
return false;
	int data::getdaysinmonth (int year,int month)//Get the number of days per month {int days[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
	if (Isleapyear (year) && (month==2)) {days[month]++;
return Days[month]; } ostream& operator<< (ostream& _cout, const data& d) {_cout<<d._year<< "-" <<d._
	month<< "-" <<d._day;
return _cout;
	} istream& operator>> (istream& _cin, data& d) {_cin>>d._year>>d._month>>d._day;
return _cin; Data & Data:: operator = (CONST Data &d) {if (this!= &d) {_year=d._year;
		_month=d._month;
	_day=d._day;
return *this;
		} Data data::operator+ (int day) {if (day<0) {day=0-day;
	return *this-day;
	} Data tmp (*this);
	Tmp._day+=day;
		while (Tmp._day>getdaysinmonth (Tmp._year,tmp._month)) {tmp._day-=getdaysinmonth (tmp._year,tmp._month);
		tmp._month++;
			if (tmp._month==13) {tmp._month=1;
		tmp._year++;
} return TMP;
		Data data:: operator-(int day) {if (day<0) {day=0-day;
	return *this+day;
	} Data tmp (*this);
	Tmp._day-=day;
		while (tmp._day<=0) {tmp._month--;
			if (tmp._month==0) {tmp._month=12;
		tmp._year--;
	} tmp._day+=getdaysinmonth (Tmp._year,tmp._month);
return TMP;
	int Data::operator-(const Data &d) {int count=0;
		if (*this>d) {Data tmp=d;
			while (tmp!=*this) {tmp++;
		count++;
	return count;
		else {Data tmp=*this;
			while (Tmp!=d) {tmp++;
		count++;
	return count; } Data & DaTa::operator + + ()//predecessor + + {_day+=1;
		if (_day>getdaysinmonth (_year,_month)) {_month++;
			if (_month==13) {_year++;
		_month=1;
	} _day=1;
return *this;
	} data Data::operator + + (int)//post + + {data tmp=*this;
	_day+=1;
		if (_day>getdaysinmonth (_year,_month)) {_month++;
			if (_month==13) {_year++;
		_month=1;
	} _day=1;
return TMP;
	Data & Data::operator-()//front---{_day-=1;
		if (_day==0) {_month--;
			if (_month==0) {_year--;
		_month=12;
	} _day=getdaysinmonth (_year,_month);
return *this;
	} Data Data::operator-(int)//post--{data tmp=*this;
	_day-=1;
		if (_day==0) {_month--;
			if (_month==0) {_year--;
		_month=12;
	} _day=getdaysinmonth (_year,_month);
return TMP;
	BOOL Data::operator > (const Data &d) {if (_year>d._year) {return true;
		' Else if (_year==d._year) {if (_month>d._month) {return true;
else if (_month==d._month) {if (_day>d._day) {				return true;
}} return false;
	BOOL Data::operator < (const Data &d) {if (_year<d._year) {return true;
		' Else if (_year==d._year) {if (_month<d._month) {return true;
			' Else if (_month==d._month) {if (_day<d._day) {return true;
}} return false; BOOL Data::operator >= (const Data &d) {return! (
*THIS&LT;D); BOOL Data::operator <= (const Data &d) {return! (
*THIS&GT;D); BOOL Data::operator = = (Const Data &d) {return (_year==d._year) && (_month==d._month) && (_day==d._
Day); BOOL Data::operator!= (const Data &d) {return! (
*this==d);

 }

The test function void Test1 () {Data D1 (2016,9,30);
	Data D2 (2016,10,6);
	D1=D2;
	d2=d2+999;
	d1=d1-999;
	Data d=--d2;
	d=d2--;
	Data D3 (2016,9,30);
	Data D4 (2001,10,6);
	int ret=d3-d4;
cout<<ret<<endl;
	} void Test2 () {Data D1 (2016,11,8);
	Data D2 (2016,11,7);
	if (d1>d2) {cout<< "d1>d2" <<endl;
	} Data D3 (2016,11,6);
	Data D4 (2016,11,7);
	if (d3<d4) {cout<< "d3<d4" <<endl;
	} Data d5 (2016,11,9);
	Data d6 (2016,11,7);
	if (d5>=d6) {cout<< "D5>=d6" <<endl;
	} Data D7 (2016,10,6);
	Data D8 (2016,10,21);
	if (D7&LT;=D8) {cout<< "D7<=d8" <<endl;
	} Data D9 (2016,11,6);
	Data D0 (2016,11,6);
	if (d9==d0) {cout<< "d9==d0" <<endl;
	Data da (2016,11,6);
	Data db (2016,11,7);
	if (da!=db) {cout<< "da!=db" <<endl;
	} void Test3 () {Data D1 (2016,3,2);
	cin>>d1;
cout<<d1<<endl;
	int main () {test1 ();
	Test2 ();
	Test3 ();
	System ("pause");
return 0; }