pass by reference college assignment

[frustrated]

Hello.
I've searched your archives and found a similar question to mine and although I found your replies useful I am now stuck.
I am doing a project call NEWDAY using a pass by reference where I have to:
Write a function named NEWDAY using 3 parameters for month, day and year. ND has to increment the date represented by month,day and year.
Also have to write a main program which inputs a date (m,d,y) from keyboard and calls the NEWDAY in a loop in order to display the next 10 dates following input date. Main prog. handles all input/output.
This is what I have so far but it's not right and I am stuck as to how to proceed:
This is due tomorrow and I've worked many, many hours on this and I am just lost. I'm not asking anyone to fix this, just point me in the right direction, pretty please? Thank you so much.

#include <iostream>
using namespace std;
void NEWDAY (int&, int&, int&);
int main ()

{

int day=1, month=1, year, n;
cout<<"Enter a month (1-12): ";
cin>>month;
cout<<"Enter a day (1-31): ";
cin>>day;
cout<<"Enter year (yyyy): ";
cin>>year;
cout<<"The next ten days are: " <<endl;
for (n=0; n<=10; n++)
{
NEWDAY(month, day, year);
cout<<month <<"/" <<day <<"/" <<year <<endl;
}
system ("pause");
return 0;
}
void NEWDAY (int& d, int&m, int&y)
{

d++;
if ((m==4)||(m==6)||(m==9)||(m==11))

if(d>30);
{
d=1;
cout<<endl;
m++;

}
if (m==2)
{
if (d>28);
d=1;

m++;
}

if (m>12);
{m=1;
y++;
}







}

[Disch]

NEWDAY(month, day, year);  // note the order of the params 

void NEWDAY (int& d, int&m, int&y)  // note again 

[frustrated]

Okay, fixed that, thank you!

When I run this using 12/31/2009 it gives me 1/1/2010...1/1/2011 etc. So obviously I do not need the y++ because it is incrementing years and not days.

[jsmith]

Also note extraneous semicolons:

if(d>30);
if (d>28);
if (m>12);

[frustrated]

I finally got it working, now, any pointers on how to incorporate leap year into this? Because I really have no idea where to put the code.

here is the program as I have it now:
(and once again thank you so much for your time)

#include <iostream>
void NEWDAY(int&, int&, int&); //function prototype
using namespace std;
int main ()
{

int month,day,year,n;
cout << "Enter a month(1-12): ";
cin >> month;
cout << "Enter a day(1-31): ";
cin >> day;
cout<< "Now enter a year(yyyy): ";
cin >> year;
cout << endl;

cout<< " The next ten days are: \n";
cout<<endl;
for (n=1;n<=10;n++)
{
NEWDAY(month,day,year);
cout <<month<<"/"<<day<<"/"<<year<<endl;
}
system ("pause");
return 0;
}
void NEWDAY (int& m, int& d, int& y) //function header
{
d++;
if ((m==4)||(m==6)||(m==9)||(m==11))
if (d>30)
{
d=1;
m++ ;
}
{
}
if ((m==1)||(m==3)||(m==5)||(m==7)||(m==8)||(m==10))
if (d>31)
{
d=1;
m++;
}
if (m == 2)
if ( d > 28)
{
d=1;
m++;
}
if(m == 12)
if (d > 31)
{
y++;
d=1;
m=1;
{
}

}
}

[Zhuge]

Apologies, but could you please use code tags?

http://www.cplusplus.com/articles/firedraco1/

[frustrated]

I'm sorry, I have no idea how I would even use code tags for this program. I am terribly programming illiterate and after taking this class I will leave it to those that truly understand it. :)
If my program is a jumbled mess I apologize and I understand that it will be impossible to help me. Please forgive my ignorance.

[Zhuge]

???

[code]/* stuff */[/code]
becomes
/* stuff */

[frustrated]

I understand /* stuff */
becomes
/* stuff */
(I did go and read the article)
But, my ignorance is that I do not know what you want me to [code]. What parts of the program? Thanks again for your patience and assistance.

[mcleano]

No. He means put the code you have there, inside the [code] tags

EDIT: I haven't looked at your code because it is not within [code]tags but in answer to your leap question just do 'year % 4. If it returns 0 it is a leap year.

[frustrated]

Okay, now that I feel REALLY dumb...is this what you meant?
if not I'm going to just crawl in a hole. *laughs* thanks!

#include <iostream>    

void NEWDAY(int&, int&, int&); //function prototype
using namespace std;
int main ()
{
   
    int month,day,year,n;
    cout << "Enter a month(1-12): ";
      cin >> month;
    cout << "Enter a day(1-31): ";
      cin >> day;
    cout<< "Now enter a year(yyyy): ";
      cin >> year;
    cout << endl;
             
    cout<< "The next ten days are: \n";  
    cout<<endl;
        for (n=1;n<=10;n++)
{
      NEWDAY(month,day,year);
      cout <<month<<"/"<<day<<"/"<<year<<endl;
}
       system ("pause");
       return 0;
}
void NEWDAY (int& m, int& d, int& y) //function header
{
       d++;
         if ((m==4)||(m==6)||(m==9)||(m==11))
         if (d>30)
{ 
                d=1;
       m++ ;
}                                                
{
}
         if ((m==1)||(m==3)||(m==5)||(m==7)||(m==8)||(m==10))
         if (d>31)
{  
        d=1;
        m++;
}
          if (m == 2)
          if ( d > 28)
{
        d=1;
        m++;
}
          if(m == 12)
          if (d > 31)
{
        y++;
        d=1;
        m=1;
{
}
       
}
}

[Zhuge]

Yes, that's it. The indentation is weird though; why are all of the curly braces outdented as much as possible?

And I would try running it through a debugger to see exactly what the variables are at certain points. You will probably be able to figure out what the error is using only that.