tidy up code

[Umar]

Hi,

I am new to emacs. I want to tidy up my code so that it is more
readable. For example:

int main(void)
{
  int a = 1;
     if (a == 1)
   cout << "true" << endl;
  else
        cout << "false" << endl;
    return 0;
       }

to become

int main(void)
{
  int a = 1;
  if (a == 1)
    cout << "true" << endl;
  else
    cout << "false" << endl;
  return 0;
}