int main()
{
   int firstnum ;

   printf("Enter First Number :-");

   scanf("%d" , &firstnum );

       int numtoo ;
              
       if((firstnum)%2 == 0) 
       {
           int firstquo ; 

           int numtoo = 1 ; 

           int test1; 
           test1 = firstnum ;

           do
           {
               firstquo = (test1)/2 ;

               numtoo ++ ;

               test1 = firstquo ;
           } while((test1)%2 == 0);
       }
       else 
       {
           numtoo = 0 ; 
       }

       printf("%d" , numtoo); 
}

What is this program?

I am making a program that calculates HCF of two user-input numbers. This is a small part of a bigger program. When I try to test this program separately I get the message Enter First Number. When I click enter I do not get the Numtoo value. Where did I go wrong?