我是编码的新手。我正在尝试在jGrasp中编写工资单寄存器，但我一直收到这些错误：“找不到符号”，“变量已在方法中定义”。看起来我已经定义了一个变量，但我无法弄清楚要改变它以使其正常工作。我在下面标记了错误。在此先感谢您的帮助！
//Lab4 Payroll Register Refinements
//this makes available all extra utilities from Java library including scanner
import java.util.*;
import java.io.*; //needed for files
public class Lab4 // class name MUST be name of .java file
{//start of class
public static void main(String [] args) throws FileNotFoundException
{// start of main method
Scanner keyIn = new Scanner(System.in);
// assigns "keyIn" to keyboard
Scanner inPayrollFile = new Scanner(new FileReader("Lab4Input1.txt"));
// assigns "inPayrollFile" to input file
PrintWriter outPayrollFile = new PrintWriter("Lab4Output1.txt");
// assigns "outPayrollFile" to output file
//System.out displays on the monitor
//Variables and defined constants go here
final String HEADING1 = "ID# HOURS RATE GROSS DEDUCT NET"; //example of a defined constant
String employeeName; //Employee's name is entered
int empId; //Employee's Id number is entered
int empDeptCode; //Employee's department code is entered
double hoursWorked; //Amount of hours worked is entered
double hourlyPayRate; //Employee's hourly pay rate is entered
double empOvertimePay; //Employee's overtime rate
double empRegPay; //Employee's regular rate of pay
double empBonus; //Employee's bonus pay
double grossPay; //Employee's gross pay
double deduction; //Amount deducted from gross pay
double netPay; //Employee net pay
double totalGrossPay = 0; //Employee's total gross pay
double totalNetPay = 0; //Employee's total net pay
double totalDeduction = 0;//Total amount deducted
int totalEmployees = 0; //Total number of employees
///////////////////////////////////////////////////////////////////////////
//instructions start here
System.out.println ("Please enter Employee name: ");
employeeName = keyIn.nextLine();
//before loop instructions go here
outPayrollFile.println (HEADING1);
//example of Printing report heading to the output file
///////////////////////////////////////////////////////////////////////////
//loop, which has input, process, output
while(inPayrollFile.hasNext())
{//start while loop - hasNext is TRUE when there is an input record
// hasNext is FALSE when no more input records - the loop ends
//input - within loop
empId = inPayrollFile.nextInt(); //example of reading from input file
hoursWorked = inPayrollFile.nextDouble ( );
hourlyPayRate = inPayrollFile.nextDouble ( );
empDeptCode = inPayrollFile.nextInt ();
System.out.println ("Processing empId" + empId);
//process - within loop
empRegPay = getRegPay(hoursWorked, hourlyPayRate);
empOvertimePay = getEmpOvertimePay(hoursWorked, hourlyPayRate);
grossPay = empRegPay + empOvertimePay;
empBonus = getBonus(grossPay, hoursWorked, empDeptCode);
grossPay = grossPay + empBonus;
deduction = getDeduction(grossPay);
netPay = grossPay - deduction;
if (grossPay > 1000)
{
deduction = grossPay * 0.30;
}
else
{ deduction = grossPay * 0.25;
} //endif
netPay = (grossPay - deduction);
totalGrossPay = (totalGrossPay + grossPay);
totalDeduction = (totalDeduction + deduction);
totalNetPay = (totalNetPay + netPay);
totalEmployees = (totalEmployees + 1);
if (grossPay > 1000)
{
deduction = grossPay * 0.30;
}
else
{ deduction = grossPay * 0.25;
} //endif
//output - within loop
outPayrollFile.printf ("%4d", empId);
outPayrollFile.printf ("%10.2f", hoursWorked);
outPayrollFile.printf ("%10.2f", hourlyPayRate);
outPayrollFile.printf ("%10.2f", grossPay);
outPayrollFile.printf ("%10.2f", deduction);
outPayrollFile.printf ("%10.2f%n", netPay);
}//end while loop
///////////////////////////////////////////////////////////////////////////
//after loop instructions go here
System.out.println ( );
outPayrollFile.printf ("Total%29.2f", totalGrossPay);
outPayrollFile.printf ("%10.2f", totalDeduction);
outPayrollFile.printf ("%10.2f%n", totalNetPay);
outPayrollFile.printf ("Total Employees%4d", totalEmployees);
inPayrollFile.close( );
outPayrollFile.close( );
System.out.println ("Program Completed");
System.out.println ("Program written by " + employeeName);
}//end of main
///////////////////////////////////////////////////////////////////////////
//regular pay method goes here
///////////////////////////////////////////////////////////////////////////
public static double getRegPay (double mEmpHours, double mEmpRate)
{//begin method
double result; //local variable for gross
if (mEmpHours > 40)
{
result = mEmpRate * 40;
}
else
{ result = mEmpHours * mEmpRate;
} //endif
return result; //value in mGross is returned
}//end method
///////////////////////////////////////////////////////////////////////////
//overtime pay method goes here
///////////////////////////////////////////////////////////////////////////
public static double getEmpOvertimePay (double mEmpHours, double mEmpRate)
{//begin method
double result; //local variable for gross
if (mEmpHours > 40)
{
result = mEmpRate * 1.5 * (mEmpHours - 40);
}
else
{ result = 0;
} //endif
return result; //value in mGross is returned
}//end method
///////////////////////////////////////////////////////////////////////////
//gross pay method goes here
///////////////////////////////////////////////////////////////////////////
public static double getGrossPay (double empRegPay, double empOvertimePay)
{//begin method
double result; //local variable for gross pay
result = empRegPay + empOvertimePay;
return result; //value in gross pay is returned
}//end method
///////////////////////////////////////////////////////////////////////////
//bonus pay method goes here
///////////////////////////////////////////////////////////////////////////
public static double getBonus (double mGrossPay, double mEmpHours, int mEmpDept)
{//begin method
double mBonus; //local variable for bonus
if (mEmpDept ==25)
if (mEmpHours >= 40)
mBonus = 0.10 * mGrossPay;
else
mBonus = 0.05 * mGrossPay;
else mBonus = 0;
return mBonus; //value in mBonus is returned
}//end method
//switch method/translation of department code to department name
public static String getEmpDeptCode (int empDeptCode)
{//begin method
String empDeptNumb;
switch (empDeptNumb)
{//begin switch
case 20: //if code = 20
empDeptNumb = "Administration";
break;
case 23: //if code = 23
empDeptNumb = "Production";
break;
case 25: //if code = 25
empDeptNumb = "Sales";
break;
default: //else if none of the cases are true
empDeptNumb = "Invalid";
}//end switch
return empDeptNumb;
}//end method
///////////////////////////////////////////////////////////////////////////
//second gross pay method goes here
///////////////////////////////////////////////////////////////////////////
public static double getEmpGrossPay (double empGrossPay, double empBonus)
{//begin method
double result; //local variable for gross pay
result = empGrossPay + empBonus;
return result; //value in gross pay is returned
}//end method
//////////////////////////////////////////////////////////////////////////
//deduction pay method goes here
//////////////////////////////////////////////////////////////////////////
public static double getDeduction (double mGross)
// getDeduction is the value-returning method name
// it will be sent a double and that value goes into mGross
{//begin method
double mDeduction; //local variable for deduction
if (mGross > 1000)
mDeduction = (mGross - 1000) * 0.30 + 225;
else
if (mGross > 500)
mDeduction = (mGross - 500) * 0.25 + 100;
else
mDeduction = mGross * 0.20;
return mDeduction; //value in mDeduction is returned
}//end method
//////////////////////////////////////////////////////////////////////////
//net pay method goes here
//////////////////////////////////////////////////////////////////////////
public static double getNetPay (double empGrossPay, double empDeduction)
{//begin method
double netPay; //local variable for net pay
result = empGrossPay - empDeduction; <--- this is the first error
return result; //value in net pay is returned <--- this is the second error
}//end method
///////////////////////////////////////////////////////////////////////////
//department code method goes here
///////////////////////////////////////////////////////////////////////////
public static double empDeptNumb (double empDeptNumb)
{//begin method
double empDeptCode; //local variable for empDeptCode <---this is the third error
result = empDeptNumb; <---this is the fourth error
return result; //value in empDeptNumb is returned <--- the final error
}//end method
}//end of class
答案 0 :(得分：1)
您需要更改switch
当你在switch(empDeptNumb)语句中与整数20,30等进行比较时switch(empDeptCode)到case empDeptCode为switch(empDeptCode)是整数，如果你改为{{1} }，它会起作用。
答案 1 :(得分：0)
我认为这完全是由于一个错字。你有“switch（empDeptNumb）”的地方应该是“switch（empDeptCode）”