【发布时间】：2012-03-07 09:48:26
【问题描述】：
好的，所以我有一个小任务要做，需要一些类数组并调用各种方法来完成工作。从本质上讲，我也希望通过这个程序学习一些东西，它的想法是创建一个客户账户、存款、取款等。到目前为止，我已经编写了这段代码，但我得到了下面给出的错误。请以任何可能的方式帮助我。并且 var++ 不允许在 Java 中增加数字吗？？
import java.util.*;
public class Bank
{
int cId;
String cName;
float cBalance;
}
class Banking
{
public static void main(String args[])
{
int limit=1;
System.out.println(+limit);
while (limit==1)
{
System.out.println("Menu:");
System.out.println("1. Add Customer");
System.out.println("2. View Customer Details");
System.out.println("3. Banking Options");
System.out.println("Enter choice:");
Scanner scan = new Scanner (System.in);
int i=scan.nextInt();
switch (i)
{
case 1:
{
System.out.println("Add the customer");
Customer();
}
/*case 2:
{
System.out.println("Customer details");
getCustomer();
}
case 3:
{
System.out.println("Banking options");
System.out.println("1. Deposit");
System.out.println("2. Withdraw");
System.out.println("3. Balance Enquiry");
Scanner scan1 = new Scanner (System.in);
int j=scan1.nextInt();
switch (j)
{
case 1:
{
System.out.println("Deposit");
deposit();
}
case 2:
{
System.out.println("Withdraw");
withdraw();
}
case 3:
{
System.out.println("Balance Enquiry");
balance();
}
}
}
} */
System.out.println("Enter 0 to exit or 1 to continue operations");
Scanner s = new Scanner (System.in);
limit=scan.nextInt();
}
}
}
}
public static void Customer (String []a)
{
int cust=0;
Bank c[cust] = new Bank();
System.out.println("Enter customer ID:");
Scanner scan11 = new Scanner (System.in);
int k=scan11.nextInt();
c[cust].cId=k;
System.out.println("Enter customer name:");
Scanner scan12 = new Scanner (System.in);
String name=scan12.next();
c[cust].cName=name;
System.out.println("Enter starting balance:");
Scanner scan132 = new Scanner (System.in);
float bal=scan132.nextFloat();
c[cust].cBalance=bal;
System.out.print("Customer id=" +c[cust].cId );
cust++;
}
}
这里给出了错误：
bank.java:73: class, interface, or enum expected
public static void Customer (String []a)
^
bank.java:76: class, interface, or enum expected
Bank c[cust] = new Bank();
^
bank.java:77: class, interface, or enum expected
System.out.println("Enter customer ID:");
^
bank.java:78: class, interface, or enum expected
Scanner scan11 = new Scanner (System.in);
^
bank.java:79: class, interface, or enum expected
int k=scan11.nextInt();
^
bank.java:80: class, interface, or enum expected
c[cust].cId=k;
^
bank.java:81: class, interface, or enum expected
System.out.println("Enter customer name:");
^
bank.java:82: class, interface, or enum expected
Scanner scan12 = new Scanner (System.in);
^
bank.java:83: class, interface, or enum expected
String name=scan12.next();
^
bank.java:84: class, interface, or enum expected
c[cust].cName=name;
^
bank.java:85: class, interface, or enum expected
System.out.println("Enter starting balance:");
^
bank.java:86: class, interface, or enum expected
Scanner scan132 = new Scanner (System.in);
^
bank.java:87: class, interface, or enum expected
float bal=scan132.nextFloat();
^
bank.java:88: class, interface, or enum expected
c[cust].cBalance=bal;
^
bank.java:90: class, interface, or enum expected
System.out.print("Customer id=" +c[cust].cId );
^
bank.java:91: class, interface, or enum expected
cust++;
^
bank.java:94: class, interface, or enum expected
}
^
17 errors
非常感谢大家！！
【问题讨论】：
-
一方面，您需要在 switch 中使用 break 语句。但是，这可能无法解决您的错误。是的，var++ 是在 Java 中将变量增加 1 的完全可接受的方式。而且我相信您会遇到依赖错误。您应该有一个该程序所引用的 Bank 类。如果是家庭作业，那么很可能是教授提供的，或者你要自己定义 Bank 类。
-
是的，您可以使用 ++ 在 java 中增加数字：docs.oracle.com/javase/tutorial/java/nutsandbolts/op1.html
-
我将首先将您的一个类文件重构为三个单独的类文件，每个类一个。分解问题可能会帮助您解决它（或至少缩小编译错误的范围）。