#include<stdio.h>
int?main(){
????int?num?=?123;
????int?first,second,third;
????first?=?num/100;
????second?=?num/10%10;
????third?=?num%100;
????
????int?reverseNum;
????reverseNum?=?third?*100+second*10+?first?;
????
????printf("The?reverse?number?of?%d?is?%d.\n",num,reverseNum);
????
}