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What will be the output of the program?

#include
 int sumdig(int); 
 int main()
 {     
    int a, b; 
    a = sumdig(123);   
    b = sumdig(123);   
    printf("%d, %d\n", a, b);    
    return 0; 
}
int sumdig(int n)
{    
   int s, d;    
   if(n!=0)   
   {
       d = n%10;        
       n = n/10;        
       s = d+sumdig(n);   
   }
 else      
      return 0;  
   return s;
}