Before:

// Determining birth sign
if( 6 == month && day <= 21 )
{
   sign = "Gemini";
}

if( 6 == month && day > 21 )
{
   sign = "Cancer";
}

if( 7 == month && day <= 21 )
{
   sign = "Cancer";
}

if( 7 == month && day > 21 )
{
   sign = "Leo";
}