问题：
无法获取应付款总额[重复]
蓟清野
我设计了一个程序，当用户输入“y”时，当询问他们是否希望继续时，它将重新运行。我遇到的问题是，一旦用户输入“n”，程序就应该显示从购买的所有票证选项中支付的总金额。我花了几个星期的时间在这个问题上，不确定下一步该怎么办。我只包含了代码的底部。我还附上了一张照片，以便在程序运行时显示我的问题。
这是我的代码：
package cse1pgx_a2;
import java.util.Scanner;
public class CSE1PGX_A2 {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
int option, quantity, confirm;
float childTotal = 0;
float adultTotal = 0;
float seniorTotal = 0;
float finalTotal = 0;
final double childCost = 18;
final double adultCost = 36;
final double seniorCost = 32.50;
boolean continueLoop = true;
char resume;
Scanner input = new Scanner(System.in);
while (continueLoop) {
System.out.println("\t"+ "@@@@@ Welcome to Zoos Victoria @@@@@");
System.out.println("\t" + "\t" + "MAIN MENU" + "\n");
System.out.println("\t" + "Zoo has the following ticketing options" + "\n");
System.out.println("\t" + "1 = Child (4-6 yrs)");
System.out.println("\t" + "2 = Adult (16+ yrs)");
System.out.println("\t" + "3 = Senior (60+ yrs)" + "\n");
System.out.println("Enter your option:" );
option=input.nextInt();
switch (option) {
case 1:
System.out.println("Enter total No of tickets for Child:" );
quantity=input.nextInt();
System.out.println("You are purchasing " + quantity + " child tickets at " + childCost + " each!");
System.out.println("Press 1 to confirm");
confirm=input.nextInt();
break;
case 2:
System.out.println("Enter total No of tickets for Adult:" );
quantity=input.nextInt();
System.out.println("You are purchasing " + quantity + " adult tickets at " + adultCost + " each!");
System.out.println("Press 1 to confirm");
confirm=input.nextInt();
break;
default:
System.out.println("Enter total No of tickets for Senior:" );
quantity=input.nextInt();
System.out.println("You are purchasing " + quantity + " senior tickets at " + seniorCost + " each!");
System.out.println("Press 1 to confirm");
confirm=input.nextInt();
break;
}
if (confirm !=1) {
System.out.println("Incorrect key!");
}
OUTER:
while (confirm == 1) {
switch (option) {
case 1:
childTotal=(int) ((double) quantity*childCost) ;
System.out.println("Total amount for child tickets: $" + childTotal);
break OUTER;
case 2:
adultTotal=(int) ((double) quantity*adultCost) ;
System.out.println("Total amount for adult tickets $" + adultTotal);
break OUTER;
default:
seniorTotal=(int) ((double) quantity*seniorCost);
System.out.println("Total amount for senior tickets $" + seniorTotal);
break OUTER;
}
}
System.out.println("Do you wish to continue? (Y/N) ");
resume = input.next().charAt(0);
if (resume == 'y' || resume == 'Y') {
} else {
continueLoop = false;
switch (option) {
case 1:
finalTotal=(float) ((double) childTotal+adultTotal+seniorTotal) ;
System.out.println("Total amount payable: $ " + finalTotal);
break;
default:
System.out.println("Error");
}
}
}
}
}
共有3个答案
徐凌
我想玩，但不完全理解问题…所以我从头开始开发应用程序。Suryakant更快，所以请接受他的回答（如果它解决了您的问题）。我只是在这里发布这个，因为我在这里工作：-）
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
boolean continueLoop = true;
Map<TicketType, Integer> purchases=new HashMap<>();
do {
TicketType type = printMenu(scan);
System.out.println("Enter number of tickets for " + type.label);
int quantity = scan.nextInt();
System.out.println("You are purchasing "+quantity + " "+ type.label+ " ticket at "+type.cost+" each. " +
"Press 1 to confirm?");
int confirm= scan.nextInt();
if (confirm!=1) continue;
if (purchases.containsKey(type)){
purchases.put(type,purchases.get(type)+quantity);
System.out.println("You now have " +purchases.get(type) +" "+type.label +" tickets in total");
}else {
purchases.put(type,quantity);
}
System.out.println("You have added " +quantity +" "+type.label +" tickets in your basket.");
System.out.println("Do you wish to continue (Y|N)?");
String resume=scan.next();
if (resume.startsWith("Y") || resume.startsWith("y")){
continueLoop=true;
}else {
continueLoop=false;
}
}while (continueLoop);
System.out.println("Purchases");
long total=0;
for (Map.Entry<TicketType, Integer> ticketTypeIntegerEntry : purchases.entrySet()) {
System.out.println(ticketTypeIntegerEntry.getKey().label+"("+ticketTypeIntegerEntry.getValue()+")");
total+=ticketTypeIntegerEntry.getKey().cost*ticketTypeIntegerEntry.getValue();
}
System.out.println("Total payable ammount: "+total);
}
private static TicketType printMenu(Scanner scan) {
System.out.println("Welcome");
TicketType type;
int k = -1;
do {
for (TicketType ticketType : TicketType.values()) {
System.out.println(ticketType.id + ". for " + ticketType.label);
}
System.out.println("Enter your option");
k = scan.nextInt();
} while ((type=TicketType.valuefromId(k))==null);
return type;
}
private enum TicketType {
CHILD(1, "Child", 18D),
ADULT(2, "Adult", 36D),
SENIOR(3, "Senior", 18.5D);
int id;
String label;
double cost;
private static Map<Integer,TicketType> map=new HashMap<Integer,TicketType>();
static {
for (TicketType ticketType : TicketType.values()) {
map.put(ticketType.id,ticketType);
}
}
TicketType(int id, String label, double cost) {
this.id = id;
this.label = label;
this.cost=cost;
}
public static TicketType valuefromId(int id){
return map.get(id);
}
}
}
阅读方面的进步。我会首先检查我读到的是否是字符。。
拓拔霄
试试这个代码。我希望这有帮助。
public static void main(String[] args) {
int option, quantity, confirm; //minor change
float childTotal = 0;
float adultTotal = 0;
float seniorTotal = 0;
float finalTotal = 0; //minor change
final double childCost = 18;
final double adultCost = 36;
final double seniorCost = 32.50;
boolean continueLoop = true;
char resume;
System.out.println("Do you wish to continue? (Y/N) ");
resume = input.next().charAt(0);
if (resume == 'y' || resume == 'Y') {
}else{
continueLoop = false;
switch (option) {
case 1:
finalTotal+=(double) quantity*childTotal ; //minor change
System.out.println("Total amount payable: $" + childTotal);
break;
case 2:
finalTotal+=(double) quantity*adultTotal ; //minor change
System.out.println("Total amount payable $" + adultTotal);
break;
default:
finalTotal+=(double) quantity*seniorTotal; //minor change
System.out.println("Total amount payable $" + seniorTotal);
break;
}
}
}
}
}
卞安邦
我已经修复了问题，也更新了代码以获得更好的性能。
package test;
import java.util.Scanner;
public class CSE1PGX_A2 {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
final float childCost = 18;
final float adultCost = 36;
final float seniorCost = 32.50F;
boolean continueLoop = true;
Scanner input = new Scanner(System.in);
float childTotal = 0;
float adultTotal = 0;
float seniorTotal = 0;
while (continueLoop) {
int option, confirm=0;
System.out.println("\t @@@@@ Welcome to Zoos Victoria @@@@@");
System.out.println("\t \t MAIN MENU \n");
System.out.println("\t Zoo has the following ticketing options \n");
System.out.println("\t 1 = Child (4-6 yrs)");
System.out.println("\t 2 = Adult (16+ yrs)");
System.out.println("\t 3 = Senior (60+ yrs) \n");
System.out.println("Enter your option:");
option = input.nextInt();
switch (option) {
case 1: {
System.out.println("Enter total No of tickets for Child:");
int quantity = input.nextInt();
childTotal = quantity * childCost;
System.out.println("You are purchasing " + quantity + " child tickets at " + childCost + " each!");
System.out.println("Press 1 to confirm");
confirm = input.nextInt();
if (confirm == 1) {
System.out.println("Total amount for child tickets: $" + childTotal);
}
break;
}
case 2: {
System.out.println("Enter total No of tickets for Adult:");
int quantity = input.nextInt();
adultTotal = quantity * adultCost ;
System.out.println("You are purchasing " + quantity + " adult tickets at " + adultCost + " each!");
System.out.println("Press 1 to confirm");
confirm = input.nextInt();
if (confirm == 1) {
System.out.println("Total amount for adult tickets $" + adultTotal);
}
break;
}
case 3: {
System.out.println("Enter total No of tickets for Senior:");
int quantity = input.nextInt();
seniorTotal = quantity * seniorCost ;
System.out.println("You are purchasing " + quantity + " senior tickets at " + seniorCost + " each!");
System.out.println("Press 1 to confirm");
confirm = input.nextInt();
if (confirm == 1) {
System.out.println("Total amount for senior tickets $" + seniorTotal);
}
break;
}
}
if (confirm != 1) {
System.out.println("Incorrect key!");
}
System.out.println("Do you wish to continue? (Y/N) ");
char resume = input.next().charAt(0);
if (resume != 'y' && resume != 'Y') {
continueLoop = false;
System.out.println("Total amount for child tickets: $" + childTotal);
System.out.println("Total amount for senior tickets $" + seniorTotal);
System.out.println("Total amount for adult tickets $" + adultTotal);
float finalTotal = childTotal + adultTotal + seniorTotal ;
System.out.println("Total amount payable: $ " + finalTotal);
}
}
}
}
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