问:进行多个循环以及多个if语句和if-else语句||租赁汽车计算器项目 [英] Q : Doing multiple loops and multiple if-statements and if-else-statements || RENTAL CAR CALCULATOR PROJECT
问题描述
我对项目的说明如下:
说明:使用标记值循环.创建基本的租车计算器
Instructions: Use a sentinel value loop. To create a basic Rental Car Calculator
向每个用户询问:
车辆类型(可以使用字符串以外的其他方式，例如:1用于经济性，2用于轿车等) 出租天数 计算(针对每个客户):
Type of vehicle (May use something other than strings, such as: 1 for an economy, 2 for a sedan, etc.) Days rented Calculate the (For each customer):
租金， 税金 应付总额. 共有三种不同的租金选项，分别收取不同的费用:经济型@ 31.76，轿车@ 40.32，SUV @ 47.56. [注意:仅考虑全天单位(无小时费率).
Rental cost, Taxes, Total Due. There are three different rental options with separate rates: Economy @ 31.76, sedan @ 40.32, SUV @ 47.56. [Note: only whole day units to be considered (no hourly rates)].
销售税为TOTAL的6％.
Sales tax is = to 6% on the TOTAL.
使用以下方法创建摘要数据:
Create summary data with:
客户数量 收款总额. 另外，包括IPO，算法和案头检查值(设计文件).
Number of customers Total money collected. Also, Include IPO, algorithm, and desk check values (design documents).
{我要做什么和我的问题}
{WHAT I HAVE GOING AND MY QUESTION(S)}
package tests;
import java.util.InputMismatchException;
import java.util.Scanner;
public class Tester {
public static void main(String []args){
int count=0;
int days;
int cus = 10;
double DailyFee=0, NontaxTotal, CarType, Total,FullTotal=0;
boolean F1 = false, F2 = false, F3 = false;
Scanner in=new Scanner(System.in);
while (F3 == false) {
F3 = true;
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();
if (cus == 0 || cus == 1) {
F3 = true;
} else {
F3 = false;
System.out.println("Number must be either 1 or 0");
}
} catch (InputMismatchException ex) {
F3 = false;
System.out.println("Invalid entry");
in.next();
}
}
if(cus == 1) {
while(F1 == false) {
F1 = true;
count++;
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();
if (CarType <= 0 || CarType >= 4) {
System.out.print("Number must be 1-3\n");
System.out.println("Please enter 1 for an economy car");
System.out.println("Enter 2 for a sedan car");
System.out.println("Enter 3 for an SUV");
F1 = false;
} else {
if (CarType == 1) {
F1 = true;
DailyFee=31.76;
} else if(CarType == 2) {
F1 = true;
DailyFee=40.32;
} else if(CarType == 3) {
F1 = true;
DailyFee=47.56;
}
while (F2 == false) {
F2 = true;
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");
F2 = false;
} else {
double x=days;
NontaxTotal = (DailyFee * x);
Total = (NontaxTotal * 1.06);
FullTotal+=Total;
F3 = true;
}
} catch(InputMismatchException ex) {
System.out.println("Answer must be a number");
F2 = false;
in.next();
}
}
}
} catch (InputMismatchException ex) {
F1 = false;
System.out.println("Answer must be a number");
}
}
}
in.close();
System.out.println("Count of customers : " + count);
System.out.printf("Total of the Day : $ %.2f", FullTotal);
}
}
{我的问题}
-
当在提示中输入字母时，将显示按1进入租赁计算器，否则按0退出"，出现错误提示，然后控制台要求再次输入.同样，当在提示符下输入字母您想租什么车?"时，控制台继续不停地打印行?我不知道该如何解决?
When a letter is entered to the prompt "Press 1 to enter Rental Calculator or else press 0 to quit" it displays, an error prompt then the console asks for input again. Similarly, when a letter is inputted at the prompt "What vehicle would you like to rent?" the console continues to print lines with no stop? I do not know how to fix this?
我希望我的程序允许进行多个计算输入.但是，在进行完整的计算输入(天数*税额*汽车类型)之后，控制台发布摘要数据而不是循环吗? 2a.在提示请输入租用的天数.(示例； 3):"之后，并跟随用户输入.我如何让我的程序返回到询问按1进入租赁计算器，否则按0退出"?仍然使0提示我的摘要数据?
I want my program to allow multiple calculation inputs to be made. However, after full calculation input (Days * Tax * Car Type) the console post summary data rather than looping? 2a. After the prompt "Please enter the number of days rented. (Example; 3) : " and following user input. How would I get my program to loop back to asking "Press 1 to enter Rental Calculator or else press 0 to quit"? with still making 0 prompt my summary data?
推荐答案
在这里，我进行了一些修改，然后将整个过程放入while循环中(while(cus！= 0))，现在它可以正常工作了，试试此代码，如果您有任何疑问，请告诉我
Here you go, i modified it a bit and put the whole thing in a while loop (while (cus != 0)) now it is working perfectly, try this code and do let me know if you have questions
package inter;
import java.util.InputMismatchException;
import java.util.Scanner;
public class Inter {
public static void main(String []args){
int count=0;
int days;
int cus = 10; // added
double DailyFee=0, NontaxTotal, CarType, Total,FullTotal=0;
boolean F1 = false, F2 = false;
Scanner in=new Scanner(System.in);
while (cus != 0) {
while (true) {
System.out.println("If there are any customer press 1 else press 0");
try {
cus=in.nextInt();
if (cus == 0 || cus == 1) {
break;
} else {
System.out.println("Number must be either 1 or 0");
}
} catch (InputMismatchException ex) {
System.out.println("Invalid entry");
in.next();
}
}
if(cus == 1) {
while(F1 == false) {
F1 = true;
count++;
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();
if (CarType <= 0 || CarType >= 4) {
System.out.print("Number must be 1-3\n");
System.out.println("Please enter 1 for an economy car");
System.out.println("Enter 2 for a sedan car");
System.out.println("Enter 3 for an SUV");
F1 = false;
} else {
if (CarType == 1) {
F1 = true;
DailyFee=31.76;
} else if(CarType == 2) {
F1 = true;
DailyFee=40.32;
} else if(CarType == 3) {
F1 = true;
DailyFee=47.56;
}
while (F2 == false) {
F2 = true;
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");
F2 = false;
} else {
//days = in.nextInt();
double x=days;
NontaxTotal = (DailyFee * x);
Total = (NontaxTotal * 1.06);
FullTotal+=Total;
}
} catch(InputMismatchException ex) {
System.out.println("Answer must be a number");
F2 = false;
in.next();
}
}
F2 = false;
}
} catch (InputMismatchException ex) {
F1 = false;
System.out.println("Answer must be a number");
in.next();
}
}
F1 = false;
}
}
System.out.println("Count of customers : " + count);
System.out.printf("Total of the Day : $ %.2f", FullTotal);
}
}
这篇关于问:进行多个循环以及多个if语句和if-else语句||租赁汽车计算器项目的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
