Thread: C++ calendar problem?

Hey everyone So I need to make a calendar that displays 12 months for a fixed year. So far I can make it display all the month names, he right amount of days, and its formatted nice. Thing is, I cant get the first day of the month to work... so they all start on Sunday. Heres the code I have now:

Code:

#include <iostream> 
#include <string>
#include <iomanip>
using namespace std;

int MonthDays[13]= {0,31,28,31,30,31,30,31,31,30,31,30,31};
string MonthNames [13]={"Null","January","February","March…
void printmonth( const int month, const int startday, const bool leapyear); 

int main(void)
{
printmonth(1,0,false); //Print January, 1st on Sunday
printmonth(2,1,true); //Print February, 1st on Monday, Leap year
printmonth(3,2,false); //Print March, 1st on Tuesday
printmonth(4,3,false); //Print April, 1st on Wednesday
printmonth(5,5,false); //Print May, 1st on Friday 
printmonth(6,6,false); //Print June, 1st on Saturday
printmonth(7,0,false); //Print July, 1st on Sunday
printmonth(8,1,false); //Print August, 1st on Monday
printmonth(9,2,false); //Print September, 1st on Tuesday
printmonth(10,3,false); //Print October, 1st on Wednesday
printmonth(11,4,false); //Print November, 1st on Thursday
printmonth(12,5,false); //Print December, 1st on Friday
system ("pause");
return 0;
}


void printmonth( const int month, const int startday, const bool leapyear)
{
int daysinmonth = MonthDays[month];
int daynumber=1;

cout << " " << MonthNames[month] << endl;
cout << endl;
cout <<" Sun"<<" "<<"Mon"<<" "<<"Tue"<<" "<<"Wed" <<" "<<"Thu"<<" "<<"Fri"<<" "<<"Sat"<<endl;
cout << endl;

void wrapper(int daynumber, int MonthDays);
{
int colCount=1;
daynumber=1;

while (daynumber <= daysinmonth) 
{ 
colCount+1;
if (colCount == 8) 
{
cout << endl;
colCount = 1; 
}

cout << setw(4); 
cout << daynumber; 
colCount++; 
daynumber++;
}
colCount = 1;
cout << endl << endl; 
}

}

So what should I do? I was thinking a switch(startday) statement but it wasn't working... Thanks so much guys!!

^^I know it does but it lost indentation when I pasted it. Line 39 is my void 'wrapper' function to format the months correctly. Is there something wrong with it?

You have a function in a function. Put wrapper() into printMonth() and make it one function.

Alright I'll try and merge them, any idea how to solve the OP?

Code:

#include <iostream> 
#include <string>
#include <iomanip>
using namespace std;


int MonthDays[13]= {0,31,28,31,30,31,30,31,31,30,31,30,31};
string MonthNames [13]={"Null","January","February","March","April","May","June","July","August","September","October","November","December"};
void printmonth( const int month, const int startday, const bool leapyear); 


int main(void)
	{
		printmonth(1,0,false); //Print January, 1st on Sunday
		printmonth(2,1,true); //Print February, 1st on Monday, Leap year
		printmonth(3,2,false); //Print March, 1st on Tuesday
		printmonth(4,3,false); //Print April, 1st on Wednesday
		printmonth(5,5,false); //Print May, 1st on Friday 
		printmonth(6,6,false); //Print June, 1st on Saturday
		printmonth(7,0,false); //Print July, 1st on Sunday
		printmonth(8,1,false); //Print August, 1st on Monday
		printmonth(9,2,false); //Print September, 1st on Tuesday
		printmonth(10,3,false); //Print October, 1st on Wednesday
		printmonth(11,4,false); //Print November, 1st on Thursday
		printmonth(12,5,false);  //Print December, 1st on Friday
		system ("pause");
		return 0;
	}




void printmonth( const int month, const int startday, const bool leapyear)
	{
		int daysinmonth = MonthDays[month];
		int daynumber=1;
		int colCount=1;


		cout << "           " << MonthNames[month] << endl;
		cout << endl;
		cout <<"  Sun"<<" "<<"Mon"<<" "<<"Tue"<<" "<<"Wed" <<" "<<"Thu"<<" "<<"Fri"<<" "<<"Sat"<<endl;
		cout << endl;


		   while (daynumber <= daysinmonth) 
		   { 
				colCount+1;
		     if (colCount == 8) 
					 {
					    cout << endl;
					    colCount = 1; 
					 }


		      cout << setw(4); 
		      cout << daynumber; 
		      colCount++; 
		      daynumber++;
		  }
            colCount = 1;
    cout << endl << endl; 
	}

Alright there it is; functions merged and indented

There are a few ways to go about this. The way I was thinking is keep a running total of all the days and pass by reference to print month(you'll have to create a new int for that). Then take that number and mod it by 7 and add 1 to give you the starting point at each month. The very first month should start at 0 (on sunday). The next month would be 0+31, so (31%7)+1=4, so it will start 4 days over and so on. Next would be 0+31+28=(59%7)+1=4, so it would again start 4 days over. You'll have to do something similar to your colCount.

^YES! Thanks you Salem I integrated it, made a couple adjustments, and now I'm really close! All the days start correctly now I'm just trying to figure out how to get it to print to the next line at the right time... its printing 1 date outside of the column. Heres the code revised:

Code:

#include <iostream> 
#include <string>
#include <iomanip>
using namespace std;


int MonthDays[13]= {0,31,28,31,30,31,30,31,31,30,31,30,31};
string MonthNames [13]={"Null","January","February","March","April","May","June","July","August","September","October","November","December"};
void printmonth( const int month, const int startday, const bool leapyear); 


int main(void)
	{
		printmonth(1,0,false); //Print January, 1st on Sunday
		printmonth(2,1,true); //Print February, 1st on Monday, Leap year
		printmonth(3,2,false); //Print March, 1st on Tuesday
		printmonth(4,3,false); //Print April, 1st on Wednesday
		printmonth(5,5,false); //Print May, 1st on Friday 
		printmonth(6,6,false); //Print June, 1st on Saturday
		printmonth(7,0,false); //Print July, 1st on Sunday
		printmonth(8,1,false); //Print August, 1st on Monday
		printmonth(9,2,false); //Print September, 1st on Tuesday
		printmonth(10,3,false); //Print October, 1st on Wednesday
		printmonth(11,4,false); //Print November, 1st on Thursday
		printmonth(12,5,false);  //Print December, 1st on Friday
		system ("pause");
		return 0;
	}




void printmonth( const int month, const int startday, const bool leapyear)
	{
		int daysinmonth = MonthDays[month];
		int daynumber=1;
		int colCount=startday;


		cout << "           " << MonthNames[month] << endl;
		cout << endl;
		cout <<"  Sun"<<" "<<"Mon"<<" "<<"Tue"<<" "<<"Wed" <<" "<<"Thu"<<" "<<"Fri"<<" "<<"Sat"<<endl;
		cout << endl;
		cout << setw((colCount*3)+startday) << "";
	


		   while (daynumber <= daysinmonth) 
		   { 
		     if (colCount == 8) 
					 {
					    cout << endl;
					    colCount = 1; 
					 }


		      cout << setw(4); 
		      cout << daynumber; 
		      colCount++; 
		      daynumber++;
		  }
            colCount = 1;
    cout << endl << endl; 
	}

What do you guys think? I've ben trying to add 1 to the colCount but everywhere I do it it seems to make no difference...

What is the startday? Is that what day of the week the 1st of the month is?

^^ yep like a startday of 0 is January, starting on Sunday. 1 is Mon... so on

OK, I think you need to fix your start days. Jan 1st will be 0, but Feb 1st will be on Weds...so 3 would be the start day. March start day would be 3 also.