Calendar Program

[brycematheson]

I'm trying to write a Calendar program, but I'm having trouble. It asks the user for the number of days in a given month and then the offset (from Monday), and then it will display it to the screen. I'm just trying to get the basic looks of it down before I get into the more specifics like the leap years and so forth. Here's how I'm hoping it will look:

Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30

However, I can only get it to loop all the way to the right so that it looks like this:

Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 7 8 9 10 11 12 13 14...

My question is, how do I shape it like the above so that each of the rows only extend until the end of the dates? Also, how can I do the offset so that my dates will shift and start depending on the user input? Here is my code so far.

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

void displayTable(int numDays, int offset);
int getNumDays();
int getOffset();


/**********************************************************************
* MAIN
* Pretty much a delegator. Calls other functions.
***********************************************************************/
int main()
{
   //Get the number of days
   int numDays = getNumDays();

   //Get the day offset
   int offset = getOffset();

   //Displays the result
   displayTable(numDays, offset);

   return 0;
}


/**********************************************************************
 * DISPLAYTABLE
 * Displays the physical table to the screen.
 ***********************************************************************/
void displayTable(int numDays, int offset)
{
   //Declare Variables
   int days;
   int test;

   //List the day headings
   cout << "  Su  Mo  Tu  We  Th  Fr  Sa\n";

   //Displays number of days
   for (days = 1; days <= (numDays); days++)
      cout << "  " << setw(2) << days;
   return;
}


/**********************************************************************
 * OFFSET
 * Determines the number of days to offset the Calendar and then returns
 * that value back to displayTable.
 ***********************************************************************/
int getOffset()
{
   int offset;
   cout << "Offset: ";
   cin >> offset;

   return offset;
}


/**********************************************************************
 * NUMDAYS
 * Accepts the number of days from the user.
 ***********************************************************************/
int getNumDays()
{
   int numDays;
   cout << "Number of days: ";
   cin >> numDays;
   return numDays;
}

[Albatross]

In the for loop in your displayTable(), you can check if days divides perfectly by 7 (a % b == 0), and if it does cout a newline. Can you figure out how to do that?

-Albatross

[brycematheson]

I'm still struggling a little bit. I can get it to either display all of the numbers in a long string (like shown above) or show absolutely nothing except one number. Where does the "if" statement need to be placed?

Also, I am completely CLUELESS on how to do the offset. Can I do another sort of loop that adds blank placeholders or something like that based on the number that the user inputs?

[Albatross]

The if block would go inside your for loop after the cout (you will need {} for that).

As for the offset... I recall there being a standard library set of functions for that... but printing whitespaces works too for of-setting.

-Albatross

[brycematheson]

Man, I don't know what I'm doing wrong. Am I missing a major pitfall? I just can't see what I'm doing wrong and it's still not working. I've been staring at this stupid block of code for hours.

/**********************************************************************
 * DISPLAYTABLE
 * Displays the physical table to the screen.
 ***********************************************************************/
void displayTable(int numDays, int offset)
{
   //Declare Variables
   int days;

   //List the day headings
   cout << "  Su  Mo  Tu  We  Th  Fr  Sa\n";

   //Displays number of days
   for (days = 1; days <= numDays; days++)
      cout << "  " << setw(2) << days;
   {
   if (days % 7 == 0)
      cout << "\n" << days;
   }
   return;
}

[firedraco]

The { } around your for loop are slightly misplaced. As it is:

for (days = 1; days <= numDays; days++)
      cout << "  " << setw(2) << days; //for loop only loops this line
   {//random scope entry
   if (days % 7 == 0)
      cout << "\n" << days;
   }

[brycematheson]

Thank you guys SO much! I'm ALMOST there. I have on last tiny little problem that I can't quite figure out.

Here is my function so far:

void displayTable(int numDays, int offset)
{
   //Declare Variables
   int days;
   int offsetCalc;

   //Calculations
   offsetCalc = offset + (7 - offset);

   //List the day headings
   cout << "  Su  Mo  Tu  We  Th  Fr  Sa\n";

   //Offset
   if (offset == 0)
      cout << setw(4)  << " ";
   if (offset == 1)
      cout << setw(8)  << " ";
   if (offset == 2)
      cout << setw(12) << " ";
   if (offset == 3)
      cout << setw(16) << " ";
   if (offset == 4)
      cout << setw(20) << " ";
   if (offset == 5)
      cout << setw(24) << " ";
   else (offset == 6)
      ;

   //Offset
   if (offsetCalc == 7)
      cout << "\n";

   //Displays number of days
   for (days = 1; days <= numDays; days++)
   {
   cout << "  " << setw(2) << days;
   if (days % 7 == 0)
   cout << "\n";
   }
   return;
}

My last little problem is that I want the first row of days to wrap around if it runs past Saturday. So I created a little bit of code:

   //Offset
   if (offsetCalc == 7)
      cout << "\n";

This will insert a new line if it reaches the end of the row. However, if I place it before my FOR loop, then it doesn't get read and only inserts a blank line, which does me nothing. If I place it after my FOR loop, it does the same thing and just inserts a new blank line. And then, if I place it inside my FOR loop, it just gets repeated and repeated over and over and inserts a newline after each number is written to the screen.

How can I make it so that it will only be executed on the first row and then disregarded afterwards? Thank you guys!

[brycematheson]

Bump. Any suggestions?