Write a c$++$ program that uses nested loops to print a triangle like the one shown below.

$9876543210$

$876543210$

$76543210$

$6543210$

$543210$

$43210$

$3210$

$210$

$10$

$0$

The program will ask the user to enter a decimal digit, the first row of the triangle displayed consists of the digits from the entered digit down to $0.$ Use variables of type int.

Use the following prompt to ask the user for the digit to start with.

Enter a decimal digit:

Should the user not enter a decimal digit $($int in range $0$ through $9$ inclusive$),$ display the following error message, and allow the user to re$-$enter. Replace the $"$x$"$ with the integer entered erroneously.

Error, x is not a single decimal digit.