问题：
用开关循环？
武峻熙
我想做的是创建一个租车计算器。这已经为三辆不同的汽车预装了每日费用和燃油费。我想在所有东西上加6%的销售税。用户的输入决定了总数等。。
完整项目详细信息：[https://www.scribd.com/document/392038034/Bob-s-Car-Rental-Intermediate-pdf]
{我的代码当前}
package tests;
import java.util.InputMismatchException;
import java.util.Scanner;
public class Tester {
public static void main(String []args){
int days, cus, carType, fuel, count=0;
double dailyFee=0, nonTaxTotal=0, total=0, fullTotal=0, fuelcharge=0, taxes=0, avrg=0, Fullcharge=0;
boolean checkRunOrQuit = false, chooseTypeVehicle = false, numberOfDAysChosen = false, fuellevel = false, reset=true;
Scanner in=new Scanner(System.in);
while(!reset);
while ( !checkRunOrQuit ) {
System.out.print("Press 1 to enter Rental Calculator or else press 0 to quit\n");
System.out.println("Please only enter 1 or 0. Also, please only enter number(s) not letter(s)");
try {
cus=in.nextInt();
switch ( cus ) {
case 0: System.out.print("End of application\n");
System.out.println("Count of customers: " + count);
System.out.printf("Total fuel charges $ %.2f \n", Fullcharge);
System.out.printf("Total taxes collected: $ %.2f \n", taxes);
System.out.printf("Total of the Day: $ %.2f \n", fullTotal);
System.out.printf("The average bill was: $ %.2f \n", avrg);
System.exit(0);
break;
case 1: checkRunOrQuit = true;
break;
default:
System.out.println("Number must be either 1 or 0");
}
} catch (InputMismatchException ex) {
System.out.println("Invalid entry: ");
in.next();
}
}
while( !chooseTypeVehicle ) {
System.out.print("What vehical would you like to rent?\n");
System.out.println("Enter 1 for an economy car");
System.out.println("Enter 2 for a sedan car");
System.out.println("Enter 3 for an SUV");
try {
carType = in.nextInt();
chooseTypeVehicle = true;
switch ( carType ) {
case 1: dailyFee = 31.76;
count++;
break;
case 2: dailyFee = 40.32;
count++;
break;
case 3: dailyFee = 47.56;
count++;
break;
default:
System.out.print("Number must be 1-3\n");
chooseTypeVehicle = false;
break;
}
} catch (InputMismatchException ex) {
System.out.println("Answer must be a number");
in.next();
}
}
while ( !fuellevel ) {
try {
System.out.print("Is the fuel empty?\n");
System.out.println("Please enter 1 for yes.");
System.out.println("Please enter 2 for no.");
fuel = in.nextInt();
if (fuel <= 0 |fuel > 2.1) {
System.out.print("Please enter a 1 or 2\n");
} else {
fuellevel = true;
switch ( fuel ) {
case 1: fuelcharge = 40.00;
fuelcharge+=Fullcharge;
break;
case 2: fuelcharge = 0.00;
break;
}
}} catch (InputMismatchException ex) {
System.out.println("Answer must be a number");
in.next();
}
}
while ( !numberOfDAysChosen ) {
try {
System.out.print("Please enter the number of days rented. (Example; 3) : ");
days = in.nextInt();
if (days <= 0) {
System.out.println("Number of days must be more than zero");
} else {
nonTaxTotal = (dailyFee * days);
nonTaxTotal = (nonTaxTotal + fuelcharge);
total = (nonTaxTotal * 1.06);
taxes = (total - nonTaxTotal);
avrg = ( total/count );
fullTotal+=total;
numberOfDAysChosen = true;
}
} catch(InputMismatchException ex) {
System.out.println("Answer must be a number");
in.next();
}
}
System.out.printf("Rental rate: $%.2f \n", dailyFee);
System.out.printf("Total fuel charge: $%.2f \n", fuelcharge);
System.out.printf("Subtotal: $%.2f \n", nonTaxTotal);
System.out.printf("Taxes: $%.2f \n", taxes);
System.out.printf("Total: $%.2f \n", fullTotal);
System.out.print("Press 1 to enter Rental Calculator or else press 0 to quit\n");
System.out.println("Please only enter 1 or 0. Also, please only enter number(s) not letter(s)");
try {
cus=in.nextInt();
switch ( cus ) {
case 0: System.out.print("End of application. \n");
System.out.println("Count of customers: " + count);
System.out.printf("Total fuel charges $ %.2f \n", Fullcharge);
System.out.printf("Total taxes collected: $ %.2f \n", taxes);
System.out.printf("Total of the Day: $ %.2f \n", fullTotal);
System.out.printf("The average bill was: $ %.2f \n", avrg);
System.exit(0);
break;
case 1: checkRunOrQuit = true;
break;
default:
System.out.println("Number must be either 1 or 0");
break;
}} catch (InputMismatchException ex) {
System.out.println("Invalid entry: ");
in.next();
}
in.close();
System.out.printf("Rental rate: $%.2f \n", dailyFee);
System.out.printf("Total fuel charge: $%.2f \n", fuelcharge);
System.out.printf("Subtotal: $%.2f \n", nonTaxTotal);
System.out.printf("Total: $%.2f \n", fullTotal);
System.out.printf("Taxes: $%.2f ", taxes);
}
}
- 在输入租用的天数后，我希望用户能够被提升，如果他们想计算另一辆车。当我尝试标记并破坏它时，我无法成功地让代码从一开始就恢复（询问Car Type）？？
共有1个答案
拓拔辰钊
在写这篇文章之前，你必须认真考虑如何解决这个问题。你写的代码非常程序化，而且写得很糟糕。您应该真正了解如何在java中使用控制语句。
试试这个-
import java.util.InputMismatchException;
import java.util.Scanner;
public class Tester {
public static void main(String[] args) {
int days, cus, carType, fuel, count = 0;
double dailyFee = 0, nonTaxTotal = 0, total = 0, fullTotal = 0, fuelcharge = 0, taxes = 0, avrg = 0, Fullcharge = 0;
boolean checkRunOrQuit = false, chooseTypeVehicle = false, numberOfDAysChosen = false, fuellevel = false;
Scanner in = new Scanner(System.in);
while (true) {
while (!checkRunOrQuit) {
System.out.print("Press 1 to enter Rental Calculator or else press 0 to quit\n");
System.out.println("Please only enter 1 or 0. Also, please only enter number(s) not letter(s)");
try {
cus = in.nextInt();
switch (cus) {
case 0:
System.out.print("End of application\n");
System.out.println("Count of customers: " + count);
System.out.printf("Total fuel charges $ %.2f \n", Fullcharge);
System.out.printf("Total taxes collected: $ %.2f \n", taxes);
System.out.printf("Total of the Day: $ %.2f \n", fullTotal);
System.out.printf("The average bill was: $ %.2f \n", avrg);
System.exit(0);
break;
case 1:
checkRunOrQuit = true;
break;
default:
System.out.println("Number must be either 1 or 0");
}
} catch (InputMismatchException ex) {
System.out.println("Invalid entry: ");
in.next();
}
}
checkRunOrQuit = false;
while (!chooseTypeVehicle) {
System.out.print("What vehical would you like to rent?\n");
System.out.println("Enter 1 for an economy car");
System.out.println("Enter 2 for a sedan car");
System.out.println("Enter 3 for an SUV");
try {
carType = in.nextInt();
chooseTypeVehicle = true;
switch (carType) {
case 1:
dailyFee = 31.76;
count++;
break;
case 2:
dailyFee = 40.32;
count++;
break;
case 3:
dailyFee = 47.56;
count++;
break;
default:
System.out.print("Number must be 1-3\n");
chooseTypeVehicle = false;
break;
}
} catch (InputMismatchException ex) {
System.out.println("Answer must be a number");
in.next();
}
}
chooseTypeVehicle = false;
while (!fuellevel) {
try {
System.out.print("Is the fuel empty?\n");
System.out.println("Please enter 1 for yes.");
System.out.println("Please enter 2 for no.");
fuel = in.nextInt();
if (fuel <= 0 | fuel > 2.1) {
System.out.print("Please enter a 1 or 2\n");
} else {
fuellevel = true;
switch (fuel) {
case 1:
fuelcharge = 40.00;
fuelcharge += Fullcharge;
break;
case 2:
fuelcharge = 0.00;
break;
}
}
} catch (InputMismatchException ex) {
System.out.println("Answer must be a number");
in.next();
}
}
fuellevel = false;
while (!numberOfDAysChosen) {
try {
System.out.print("Please enter the number of days rented. (Example; 3) : ");
days = in.nextInt();
if (days <= 0) {
System.out.println("Number of days must be more than zero");
} else {
nonTaxTotal = (dailyFee * days);
nonTaxTotal = (nonTaxTotal + fuelcharge);
total = (nonTaxTotal * 1.06);
taxes = (total - nonTaxTotal);
avrg = (total / count);
fullTotal += total;
numberOfDAysChosen = true;
}
} catch (InputMismatchException ex) {
System.out.println("Answer must be a number");
in.next();
}
}
numberOfDAysChosen = false;
System.out.printf("Rental rate: $%.2f \n", dailyFee);
System.out.printf("Total fuel charge: $%.2f \n", fuelcharge);
System.out.printf("Subtotal: $%.2f \n", nonTaxTotal);
System.out.printf("Taxes: $%.2f \n", taxes);
System.out.printf("Total: $%.2f \n", fullTotal);
}
}
}
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