Day of the week project help

[gabigirl]

I used the code below from one I found online. The instructions are to write a program that computes the day of the week for any date entered by the user by using Zeller's congruence. The user is prompted to enter a month, date, and year . The program will then display the day of the week for that date.
these are the following dates that i should be able to run in order to check that the program is good to go. :
5 17 2008 (should be 0-sat)
10 5 2008 (should be 1-sun)
9 15 2008 (should be 2-mon)
8 5 2008 (should be 3 tue)
9 13 2006 (should be 4-wed)

1 1 2009 (should be 5 Thurs) must be typed in as 13 1 2008
2 6 2009 (should be 6-fri) must be typed in as 14 6 2008
1 10 2000 (should be 2- mon) must be typed in as 13 10 1999

I am new to c++ and am having a hard time figuring out what I need to do to correct it.

and is there a way to a program without the if and/or switch statement , so it wont print the actual word for the day of the week , i.e saturday, monday, etc,

 #include <stdio.h>
#include <math.h>
int main()
{
  int h,q,m,k,j,day,month,year;
  printf("Enter the date (dd/mm/yyyy)\n");
  scanf("%i/%i/%i",&day,&month,&year);
  if(month == 1)
  {
    month = 13;
    year--;
  }
  if (month == 2)
  {
    month = 14;
    year--;
  }
  q = day;
  m = month;
  k = year % 100;
  j = year / 100;
  h = q + 13*(m+1)/5 + k + k/4 + j/4 + 5*j;
  h = h % 7;
  switch(h)
  {
    case 0 : printf("Saturday. \n"); break;
    case 1 : printf("Sunday. \n"); break;
    case 2 : printf("Monday.  \n"); break;
    case 3 : printf("Tuesday. \n"); break;
    case 4 : printf("Wednesday. \n"); break;
    case 5 : printf("Thursday. \n"); break;
    case 6 : printf("Friday. \n"); break;
  }
  return 0;
}

[jonnin]

k = year % 7 is what I see online for another go at it.