reverse digits

#include<stdio.h>
int main()
{
int num,x,r_num=0;
printf("Input a number: ");
scanf("%d",&num);
printf("\nThe original number = %d",num);
while(num>=1)
{
x=num%10;
r_num=r_num*10+x;
num=num/10;
}
printf("\nThe reverse of the said number = %d",r_num);
return 0;
}