Write a function to validate the date input.

N/N/NN to NN/NN/NNNN are allowed. Year has to be 2 digits or 4 digits.

Month should be 1 to 12.

Day should be 1 to 28/30/31 depending on the month.

Dont worry about the leap years.

Each character should be a digit or / No other characters are allowed.

IN C++ PLEASE