How to calculate input week output constellation _ input week output constellation?

Console. WriteLine ("month");

String month = console. ReadLine()；

Console. WriteLine(" day ")；

int day = int。 Parse (console. ReadLine())；

Switch (month) (

Case "1":

//Capricorn-Aquarius

if(day & gt； = 1。 & ampday & lt= 19) {

Console. WriteLine (Capricorn);

} else if(day & gt； = 20 & amp& ampday & lt= 3 1) {

Console. WriteLine ("water bottle");

} Otherwise {

Console. WriteLine ("Wrong date entered!" );

}

Break;

Case "2":

Break;

Default value:

Break;

}