Thread: string

Can somebody explian to me whty this function will
return 7 ?

Code:

int foo(char *s1, char *s2)
{
   int c=0, s, p, found;

   for (s=0; s1[s] != '\0'; s++)
   {
      for (p=0, found=0; s2[p] != '\0'; p++)
      {
         if (s2[p] == s1[s])
         {
            found = 1;
            break;
         }
      }
      if (!found) c++;
   }    
   return c;
}

If we were to make the following call to foo what value would it return?

foo(“Asia Pacific”, “aeiou”);