C++ not reading number values from text fileWhen you open a file it's a good idea to put in a check to make sure it's open.
Need help with calendarWell to start, your Cal is not correct for Feb or March.
The last day of Jan is Sunday, so the next ...
How to input a file when I do not know the nameI would google it, lots of examples
Standard input problem I suspect showing the code would help a lot.