says operator must return a value??? Help please..

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// Chapter13_kabirh_CISP232.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"

#include <iostream>

#include <fstream>

//#include <stream>

using namespace std;

class dateType

{friend ostream &operator<<( ostream &, const dateType & );

friend istream &operator >>(istream &,dateType &);

public:

int daysInMonth(int ,int);

void setDate(int month, int day, int year);

//Function to set the date.

//The member variables dMonth, dDay, and dYear are set

//according to the parameters.

//Postcondition: dMonth = month; dDay = day; dYear = year

int getDay() const;

//Function to return the day.

//Postcondition: The value of dDay is returned.

int getMonth() const;

//Function to return the month.

//Postcondition: The value of dMonth is returned.

int getYear() const;

//Function to return the year.

//Postcondition: The value of dYear is returned.

void printDate() const;

//Function to output the date in the form mm-dd-yyyy.

dateType(int month = 1, int day = 1, int year = 2000);

//Constructor to set the date

//The member variables dMonth, dDay, and dYear are set

//according to the parameters.

//Postcondition: dMonth = month; dDay = day; dYear = year. If

// no values are specified, the default values are used to

// initialize the member variables.

bool isLeapYear(int);

dateType operator ++();

dateType operator ++(int);

dateType operator --();

dateType operator --(int);

bool dateType::operator >(dateType);

bool dateType::operator ==(dateType);

bool dateType::operator >=(dateType);

bool dateType::operator <(dateType);

bool dateType::operator !=(dateType);

bool dateType::operator <=(dateType);

private:

int dMonth; //variable to store the month

int dDay; //variable to store the day

int dYear; //variable to store the year

};

void dateType::setDate(int month, int day, int year)

{bool error=false;

int max=28;

switch(month)

{ case 1 :

case 3 :

case 5 :

case 7 :

case 8 :

case 10:

case 12: if (day > 31)

error=true;

break;

case 4 :

case 6 :

case 9 :

case 11: if (day > 30)

error=true;

break;

case 2 : if(isLeapYear(year))

max=29;

if(day>max)

error=true;

}

if(error)

{cout<<"invalid date "<<month<<"/"<<day<<"/"<<year<<" entered. Jan 1, 2000 being used\n";

month=1;

day=1;

year=2000;

}

dMonth = month;

dDay = day;

dYear = year;

}

int dateType::daysInMonth(int dMonth,int dYear)

{int daysMonth,m=dMonth;

if(m==0)

m=12;

switch(m)

{ case 1 :

case 3 :

case 5 :

case 7 :

case 8 :

case 10:

case 12: daysMonth=31;

break;

case 4 :

case 6 :

case 9 :

case 11: daysMonth=30;

break;

case 2 : if(isLeapYear(dYear))

daysMonth=29;

else

daysMonth=28;

}

return daysMonth;

}

//Pre ++

dateType dateType::operator ++()

{int daysMonth=daysInMonth(dMonth,dYear);

if(dDay==daysMonth)

{if(dMonth==12)

{dMonth=1;

dDay=1;

dYear++;

}

else

{dMonth++;

dDay=1;

}

}

else

dDay++;

return *this;

}

//Post ++

dateType dateType::operator ++(int)

{int daysMonth=daysInMonth(dMonth,dYear);

if(dDay==daysMonth)

{if(dMonth==12)

{dMonth=1;

dDay=1;

dYear++;

}

else

{dMonth++;

dDay=1;

}

}

else

dDay++;

return *this;

}

//Pre --

dateType dateType::operator --()

{int daysMonth=daysInMonth(dMonth-1,dYear);

if (dDay==1)

{if(dMonth==1)

{dMonth=12;

dDay=31;

dYear--;

}

else

{dMonth--;

dDay=daysMonth;

}

}

else

dDay--;

return *this;

}

//Post --

dateType dateType::operator --(int)

{int daysMonth=daysInMonth(dMonth-1,dYear);

if (dDay== 1)

{if(dMonth==1)

{dMonth = 12;

dDay= 31;

dYear--;

}

else

{dMonth--;

dDay=daysMonth;

}

}

else

dDay--;

return *this;

}

// >

bool dateType::operator ==(dateType other)

{if(dYear==other.dYear&&dMonth==other.dMonth&&dDay==other.dDay)

return true;

else

return false;

}

bool dateType::operator >(dateType other)

{if(dYear<other.dYear)

return false;

else if(dYear>other.dYear)

return true;

else

{if(dMonth<other.dMonth)

return false;

else if(dMonth>other.dMonth)

return true;

else

if(dDay<=other.dDay)

return false;

else

return true;

}

}

bool dateType::operator >=(dateType other)

{return *this>other||*this==other;

}

bool dateType::operator <(dateType other)

{return !(*this>=other);

}

bool dateType::operator !=(dateType other)

{return !(*this == other);

}

bool dateType::operator <=(dateType other)

{return !(*this>other);

}

ostream& operator<<( ostream &output, const dateType &d )

{output<<d.dMonth<<"-"<<d.dDay<<"-"<<d.dYear;

}

istream &operator >>(istream &input,dateType &d)

{char buffer[20];

input>>buffer;

d.dMonth=(buffer[0]-'0')*10+(buffer[1]-'0');

d.dDay=(buffer[3]-'0')*10+(buffer[4]-'0');

d.dYear=(buffer[6]-'0')*1000+(buffer[7]-'0')*100+(buffer[8]-'0')*10+(buffer[9]-'0');

}


bool dateType::isLeapYear(int year)

{

    if((year%4==0 && year%100!=0)||(year%400==0))

        return true;



    return false;



}

int dateType::getDay() const

{return dDay;

}

int dateType::getMonth() const

{return dMonth;

}

int dateType::getYear() const

{return dYear;

}

void dateType::printDate() const

{cout << dMonth << "-" << dDay << "-" << dYear;

}

//Constructor with parameters

dateType::dateType(int month, int day, int year)

{setDate(month, day, year);

}

int main()

{dateType d1(2,29,2011);

ofstream output;

output.open("date.txt");

cout<<"First date is ";

d1.printDate();

cout<<endl;

cout<<"First after post increment tomorrow ";

d1++;

d1.printDate();

cout<<endl;

cout<<"First after pre increment tomorrow ";

++d1;

d1.printDate();

cout<<endl;

cout<<"first after post decrement yesterday ";

d1--;

d1.printDate();

cout<<endl;

--d1;

cout<<"first after post decrement yesterday ";

d1.printDate();

cout<<endl;

dateType d2(2,29,2008);

cout<<"Second date is ";

d2.printDate();

d2--;

cout<<endl;

cout<<"Second after post decrement yesterday ";

d2.printDate();

cout<<endl;

--d2;

cout<<"Second after pre decrement yesterday ";

d2.printDate();

cout<<endl;

d2++;

cout<<"Second after post increment yesterday ";

d2.printDate();

cout<<endl;

++d2;

cout<<"Second after pre increment yesterday ";

d2.printDate();

cout<<endl;

dateType d3(1,2,2008);

cout<<"3rd date is ";

d3.printDate();

d3--;

cout<<endl;

cout<<"3rd after post decrement yesterday ";

d3.printDate();

cout<<endl;

--d3;

cout<<"3rd after pre decrement yesterday ";

d3.printDate();

cout<<endl;

d3++;

cout<<"3rd after post increment yesterday ";

d3.printDate();

cout<<endl;

++d3;

cout<<"3rd after pre increment yesterday ";

d3.printDate();

cout<<endl;

d1.printDate();

if(d1>d2)

{cout<<" is after ";

}

else

{cout<<" is not after ";

}

d2.printDate();

cout<<endl;

dateType d4(1,2,2008);

cout<<"d4: ";

d4.printDate();

cout<<" d2: ";

d2.printDate();

cout<<endl;

cout<<"d4==d2: "<<(d4==d2)<<endl;

cout<<"d4>d2: "<<(d4>d2)<<endl;

cout<<"d4>=d2: "<<(d4>=d2)<<endl;

cout<<"d2>d4: "<<(d2>d4)<<endl;

cout<<"d2>=d4: "<<(d2>=d4)<<endl;

cout<<"d4!=d2: "<<(d4!=d2)<<endl;

cout<<"d4<d2: "<<(d4<d2)<<endl;

cout<<"d4<=d2: "<<(d4<=d2)<<endl;

cout<<"d2<d4: "<<(d2<d4)<<endl;

cout<<"d2<=d4: "<<(d2<=d4)<<endl;

cout<<endl;

cout<<d4<<endl;

output<<d4<<endl;

cout<<"Enter a date: ";

cin>>d4;

cout<<"You entered: "<<d4<<endl;

output.close();

system("pause");

return 0;

} 

Not sure what is it asking me for. What value??

Throwing 2 errors:

error C4716: 'operator<<' : must return a value
error C4716: 'operator>>' : must return a value

Thanks guys

[Zhuge]

You say they return streams in your prototypes, but you don't actually return anything in the implementation.

[who cares]

So what am i Suppose to declare. I know its in line 440 and 454. I still don't know what to return?

[who cares]

so i put return output; }

and return input; }

should it work?

[who cares]

nevermind, it worked ok> thanks it compiles just fine. now