Question

using switch statement write a menu driven prg ;
chick and display wheather a num input by the user is a
composite num on that eg 4, 6, 8, 9.....
ii) to find the smallest digit of an integer that is
Input ex 6524
output smallest digit is 2

Answer 1

Answer:

Explanation:

bool isComposite(int n)  

{  

   // Corner cases  

   if (n <= 1)  return false;  

   if (n <= 3)  return false;  

   

   // This is checked so that we can skip  

   // middle five numbers in below loop  

   if (n%2 == 0 || n%3 == 0) return true;  

   

   for (int i=5; i*i<=n; i=i+6)  

       if (n%i == 0 || n%(i+2) == 0)  

          return true;  

   else

   return false;  

}  

   

   

// Driver Program to test above function  

int main()  

{  

   isComposite(11)?  cout << " true\n": cout << " false\n";  

   isComposite(15)?  cout << " true\n": cout << " false\n";  

   return 0;  

}