有人可以帮帮我吗？如何打印我将使用的所有项目？提前谢谢你：）
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
String choice;
String want = "";
double price, total = 0, payment, change;
System.out.println("Beauty Zone Salon");
System.out.println("Welcome Customer");
System.out.println("Hair Cut......100");
System.out.println("Manicure......200");
System.out.println("Pedicure......300");
do {
System.out.print("Enter your choice: ");
choice = input.nextLine();
if (choice.equalsIgnoreCase("Haircut")) {
System.out.println("You choose Haircut");
price = 100;
total = total + price;
System.out.print("Do you want to do another service?");
want = input.nextLine();
} else if (choice.equalsIgnoreCase("Manicure")) {
System.out.println("You choose Manicure");
price = 200;
total = total + price;
System.out.print("Do you want to do another service?");
want = input.nextLine();
} else if (choice.equalsIgnoreCase("Pedicure")) {
System.out.println("You choose Pedicure");
price = 300;
total = total + price;
System.out.print("Do you want to do another service?");
want = input.nextLine();
}
} while (want.equalsIgnoreCase("Y"));
System.out.println("ITEMS\n");
System.out.println("Your total due is " + total);
System.out.print("Enter amount of your payment:");
payment = input.nextDouble();
change = payment - total;
System.out.println("Your change is: " + change);
System.out.println("Goodbye");
}
答案 0 :(得分：1)
如果您还不知道数组，则可以在循环完成后构建字符串中的所有项目以进行打印。一开始：
String items_ordered="";
然后，对于每次购买，当您完成循环时，添加到字符串：
items_ordered+="Haircut... 100\n"
最后，打印字符串
System.out.println(items_ordered);
我认为这就是你要问的......
答案 1 :(得分：0)
这是另一种方式：
Scanner input = new Scanner (System.in);
// Pick a Service by way of Service Number entry
// rather than entering the service name.
System.out.println("Beauty Zone Salon");
System.out.println("Welcome Customer");
System.out.println("1) Hair Cut......$100.00");
System.out.println("2) Manicure......$200.00");
System.out.println("3) Pedicure......$300.00");
String want = ""; // String variable to hold the 'Do You Want More Service' answer.
String items = ""; // String variable to hold delimited items selected.
int choice = 0; // Integer varaible to hold the service selected.
double total = 0.0; // Double variable to hold the total cost of all selected services.
double payment = 0.0; // Double variable to hold the payment supplied.
double change = 0.0; // Double variable to hold the monetary amount to be returned to customer.
while (want.equalsIgnoreCase("y") || want.equals("")) {
System.out.print("\nEnter your choice (1 to 3 - 0 to cancel): ");
choice = input.nextInt();
input.nextLine(); // Handle the \r\n which isn't handled by Scanner.nextInt()
// If 0 is supplied then User wants to cancel all.
if (choice == 0) { break; }
// Hair Cut selected...
if(choice == 1){
// Make sure Hair Cut hasn't already been selected.
if (items.contains("Hair Cut")) {
System.out.println("You have already selected a Hair Cut!");
continue;
}
System.out.println("You choose Hair Cut (cost $100.00)");
if (items.equals("")) { items+= "Hair Cut ($100.00)"; }
else { items+= ";Hair Cut ($100.00)"; }
total+= 100.00;
}
// Manicure selected...
else if(choice == 2){
// Make sure Manicure hasn't already been selected.
if (items.contains("Manicure")) {
System.out.println("You have already selected a Manicure!");
continue;
}
System.out.println("You choose Manicure (cost $200.00)");
if (items.equals("")) { items+= "Manicure ($200.00)"; }
else { items+= ";Manicure ($200.00)"; }
total+= 200.00;
}
// Pedicure selected...
else if(choice == 3){
// Make sure Pedicure hasn't already been selected.
if (items.contains("Pedicure")) {
System.out.println("You have already selected a Pedicure!");
continue;
}
System.out.println("You choose Pedicure (cost $300.00)");
if (items.equals("")) { items+= "Pedicure ($300.00)"; }
else { items+= ";Pedicure ($300.00)"; }
total+= 300.00;
}
// If all items in the list have been selected by the
// customer then jump out and provide the total due.
if (items.split(";").length == 3) { break; }
want = "";
while (want.equals("") || (!want.equalsIgnoreCase("y") && !want.equalsIgnoreCase("n"))) {
System.out.print("\nDo you want to do another service? (y/n)");
want = input.nextLine();
}
}
if (!items.equals("")) {
System.out.println("\n==============================");
System.out.println("ITEMS SELECTED:");
String[] selectedItems = items.split(";");
for (int i = 0; i < selectedItems.length; i++) {
System.out.println(selectedItems[i]);
}
System.out.println("Your total due is: $"+total);
System.out.println("------------------------------");
while (payment < total) {
System.out.print("\nEnter amount of your payment (0 to cancel):");
payment=input.nextDouble(); input.nextLine();
if (payment == 0) { break; }
if (payment < total) {
System.out.print("Payment must be $" + total + " or more.");
}
}
if (payment != 0) {
change = payment - total;
System.out.println("Change back from your $" + payment + " payment is: $" + change);
}
else { System.out.println("SERVICE CANCELED!"); }
}
else { System.out.println("SERVICE CANCELED!"); }
System.out.println("\nThank you for your business, Goodbye");
答案 2 :(得分：-2)
我认为这可能会对你有所帮助
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
String choice;
String want = "";
double price, total = 0, payment, change;
List<String> totalItems = new ArrayList<>();
System.out.println("Beauty Zone Salon");
System.out.println("Welcome Customer");
System.out.println("Hair Cut......100");
System.out.println("Manicure......200");
System.out.println("Pedicure......300");
do {
System.out.print("Enter your choice: ");
choice = input.nextLine();
if (choice.equalsIgnoreCase("Haircut")) {
System.out.println("You choose Haircut");
price = 100;
totalItems.add("Harcut");
total = total + price;
System.out.print("Do you want to do another service?");
want = input.nextLine();
} else if (choice.equalsIgnoreCase("Manicure")) {
System.out.println("You choose Manicure");
price = 200;
totalItems.add("Manicure");
total = total + price;
System.out.print("Do you want to do another service?");
want = input.nextLine();
} else if (choice.equalsIgnoreCase("Pedicure")) {
System.out.println("You choose Pedicure");
price = 300;
totalItems.add("Preducure");
total = total + price;
System.out.print("Do you want to do another service?");
want = input.nextLine();
}
} while (want.equalsIgnoreCase("Y"));
System.out.println("ITEMS\n");
System.out.println("Your total due is " + total);
System.out.print("Enter amount of your payment:");
payment = input.nextDouble();
change = payment - total;
System.out.println("Your change is: " + change);
System.out.println("Goodbye");
System.out.println("Total Items:");
for(String item: totalItems){
System.out.println(item);
}
}