int main()
{
   char strg[] = "abagaadagaga";
   char* string1 = strg;

   cout << remove(string1, 'a') << endl;
   cout << remove(string1, 'g') << endl;

   return 0;
}

char* remove(const char* str, char ch)
{
   int l = length(str);

   char res[l+1];

   int j = 0;
   for (int i = 0; i <= l; i++)
      if (str[i] != ch) {
         res[j] = str[i];
         j++;
      }

  res[j] = '\0';
  return res;  // error: when returning from remove, res is out of
               // scope and its space is "discarded" from the stack
}