C and C++ Programming Resources

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A programme in C++ that if date is input it tells day?
For example
Enter Date : 1-01-1985
The day is 'Monday'

Enter Date : 2-01-1985
The day is 'Tuesday'

Restriictions are using If-else, switch,operators(/,%,*,+,-) while loop.logical operations(&& || )
Please write the programme or Explain the logic
It starts like this.
if (year%4==0)
"it is leap year"
Then what?????
PLEASE HELP.
Thanx