How to write this code in C++????

using fstream

Write a program which:

Asks the user to enter a positive integer greater than 0

Validates that the entry is a positive integer

Outputs the digits in reverse order with a space separating the digits

Outputs the even digits not in reverse order with a space separating the digits (consider zero to be even)

If there are no even digits, the an appropriate message should be displayed: There are no even digits

Outputs the odd digits not in reverse order with a space separating the digits

If there are no odd digits, the an appropriate message should be displayed: There are no odd digits

Allows user is to repeat/continue the program as many times as he/she wants

Keeps a record in a txt file named outDataFile.txt with the history of all numbers entered and the associated results, in the following format:

the original number is 1234 the number reversed 4 3 2 1 the even digits are 2 4 the odd digits are 1 3 ----------------- the original number is 135 the number reversed 5 3 1 There are no even digits the odd digits are 1 3 5 ----------------- the original number is 862 the number reversed 2 6 8 the even digits are 8 6 2 There are no odd digits -----------------