Import java.util.scanner;
Public class Lx07 {
Public static void choice() {
System.out.println ("login menu");
System.out.println(" 1 login system ");
system . out . println(" 2 exit ")；
}
Static empty selection 1() {
System.out.println ("shopping management system >; Customer information ");
System.out.println(" 1 show all customer information ");
System.out.println("2 Add customer information ");
System.out.println("3 modify customer information ");
System.out.println("4 query customer information ");
}
Static empty choice 2() {
System.out.println ("shopping management system >; True feedback ");
System.out.println(" 1 Lucky Broadcast ");
System.out.println("2 lottery ");
System.out.println("3 rd birthday greetings ");
}
Public static void main(String[] args) {
choice()；
Scanner input = new scanner (system. in);
System.out.println ("Please enter1or2");
int num = input . nextint()；
Switches (Qty)
Case 1:
System.out.println ("main menu");
System.out.println(" 1 customer information management ");
System.out.println("2 shopping settlement ");
System.out.println("3 true feedback ");
system . out . println(" 4 logout ")；
Break;
}
System.out.println ("select input number");
int num 1 = input . nextint()；
Switch (num 1) {
Case 1:
choice 1()；
Break;
Case 2:
System.out.println ("shopping settlement");
Break;
Case 3:
choice 2()；
Break;
Case 4:
choice()；
Break;
}
}
}
To modify it