Check ISBN$-10(15$ pts$)$

Problem Description:

An ISBN$-10($International Standard Book Number$)$ consists of $10$ digits: $d_1{d}_2{d}_3{d}_4{d}_5{d}_6{d}_7{d}_8{d}_9{d}_{10}.$ The last digit, $d_{10},$ is a checksum, which is calculated from the other $9$ digits using the following formula:

$(d_{1}1+d_{2}2+d_{3}3+d_{4}4+d_{5}5+d_{6}6+d_{7}7+d_{8}8+d_{9}9)\%11$

If the checksum is $10,$ the last digit is denoted as $x$ according to the ISBN$-10$ convention. Write a program that prompts the user to enter the first $9$ digits as an integer and displays the $10-$digit ISBN $($including the leading zeros$).$

Requirement: Your program should read the input as a nine$-$digits integer. Do not read each digit individually.