Driving is expensive. Write a program with a car's miles/gallon and gas dollars/gallon (both doubles) as input, and output the gas cost for 20 miles, 75 miles, and 500 miles. Output each floating-point value with two digits after the decimal point, which can be achieved as follows: yourValue); System.out.printf("%.2f",
Driving is expensive. Write a program with a car's miles/gallon and gas dollars/gallon (both doubles) as input, and output the gas cost for 20 miles, 75 miles, and 500 miles. Output each floating-point value with two digits after the decimal point, which can be achieved as follows: yourValue); System.out.printf("%.2f",
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
Java. Output driving costs.
![### Educational Content
#### Topic: Driving Cost Calculation Program
Driving is expensive. In this exercise, you will write a program that calculates the gas cost for driving different distances. The program will take the car’s miles per gallon (mpg) and the gas cost per gallon (in dollars) as input, and will then output the gas cost for driving 20 miles, 75 miles, and 500 miles.
The program will output each floating-point value with two digits after the decimal point. This can be achieved using the following code snippet:
```java
System.out.printf("%.2f", yourValue);
```
The output will end with a newline.
#### Example
If the input values are:
```
20.0 3.1599
```
The program should calculate and output the gas cost for the given distances. The output will be:
```
3.16 11.85 79.00
```
**Note:** The real per-mile cost would also include maintenance and depreciation, which are not considered in this simple program.
This exercise is part of the lab activity:
- **Lab Activity**: 2.20.1 LAB: Driving costs
Here's a skeleton code to get you started:
```java
import java.util.Scanner;
public class LabProgram {
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
// Read input values
double milesPerGallon = scnr.nextDouble();
double dollarsPerGallon = scnr.nextDouble();
// Calculate costs
double cost20Miles = (20.0 / milesPerGallon) * dollarsPerGallon;
double cost75Miles = (75.0 / milesPerGallon) * dollarsPerGallon;
double cost500Miles = (500.0 / milesPerGallon) * dollarsPerGallon;
// Print costs with two decimal points
System.out.printf("%.2f ", cost20Miles);
System.out.printf("%.2f ", cost75Miles);
System.out.printf("%.2f\n", cost500Miles);
}
}
```
This code imports the `Scanner` class to enable input reading. Then it calculates the cost of driving 20, 75, and 500 miles based on the provided car's fuel efficiency and gas cost. Finally, it outputs these values formatted to two decimal places.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc8f23c41-b0a2-4b7f-b455-de9ffcd4a71a%2Ff5a46c30-093c-45af-9c33-9fc7984e15c0%2F7jfef59_processed.jpeg&w=3840&q=75)
Transcribed Image Text:### Educational Content
#### Topic: Driving Cost Calculation Program
Driving is expensive. In this exercise, you will write a program that calculates the gas cost for driving different distances. The program will take the car’s miles per gallon (mpg) and the gas cost per gallon (in dollars) as input, and will then output the gas cost for driving 20 miles, 75 miles, and 500 miles.
The program will output each floating-point value with two digits after the decimal point. This can be achieved using the following code snippet:
```java
System.out.printf("%.2f", yourValue);
```
The output will end with a newline.
#### Example
If the input values are:
```
20.0 3.1599
```
The program should calculate and output the gas cost for the given distances. The output will be:
```
3.16 11.85 79.00
```
**Note:** The real per-mile cost would also include maintenance and depreciation, which are not considered in this simple program.
This exercise is part of the lab activity:
- **Lab Activity**: 2.20.1 LAB: Driving costs
Here's a skeleton code to get you started:
```java
import java.util.Scanner;
public class LabProgram {
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
// Read input values
double milesPerGallon = scnr.nextDouble();
double dollarsPerGallon = scnr.nextDouble();
// Calculate costs
double cost20Miles = (20.0 / milesPerGallon) * dollarsPerGallon;
double cost75Miles = (75.0 / milesPerGallon) * dollarsPerGallon;
double cost500Miles = (500.0 / milesPerGallon) * dollarsPerGallon;
// Print costs with two decimal points
System.out.printf("%.2f ", cost20Miles);
System.out.printf("%.2f ", cost75Miles);
System.out.printf("%.2f\n", cost500Miles);
}
}
```
This code imports the `Scanner` class to enable input reading. Then it calculates the cost of driving 20, 75, and 500 miles based on the provided car's fuel efficiency and gas cost. Finally, it outputs these values formatted to two decimal places.
![### 2.20.1: LAB: Driving costs
This lab activity requires you to write a Java program to calculate driving costs. The program template provided is displayed below. You will need to complete the template by adding your code where indicated.
The starter code provided in the editor is:
```java
import java.util.Scanner;
public class LabProgram {
public static void main(String[] args) {
/* Type your code here. */
}
}
```
**Instructions:**
1. You need to import the Scanner class to allow user input.
2. Inside the `main` method, you should implement the logic to calculate driving costs.
3. Replace the comment `/* Type your code here. */` with your solution code.
**Editor Features:**
- **Develop Mode:** In this mode, you can run your program as often as you would like before submitting it for grading. Below the code editor is an input box where you can type any test input values. Click `Run program` to execute your code and observe the program's output in the second box.
- **Submit Mode:** Once you have developed your code and tested it thoroughly, switch to submit mode to finalize your submission for grading.
**Example output:**
Will be displayed in the second box after running the program.
Use the following layout for user input and program output:
```plaintext
Enter your input:
[Your input values]
Program output:
[Your output results]
```
Make sure to test your program with different inputs to ensure it correctly calculates the driving costs before submitting it for grading.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc8f23c41-b0a2-4b7f-b455-de9ffcd4a71a%2Ff5a46c30-093c-45af-9c33-9fc7984e15c0%2Fflka1p6_processed.jpeg&w=3840&q=75)
Transcribed Image Text:### 2.20.1: LAB: Driving costs
This lab activity requires you to write a Java program to calculate driving costs. The program template provided is displayed below. You will need to complete the template by adding your code where indicated.
The starter code provided in the editor is:
```java
import java.util.Scanner;
public class LabProgram {
public static void main(String[] args) {
/* Type your code here. */
}
}
```
**Instructions:**
1. You need to import the Scanner class to allow user input.
2. Inside the `main` method, you should implement the logic to calculate driving costs.
3. Replace the comment `/* Type your code here. */` with your solution code.
**Editor Features:**
- **Develop Mode:** In this mode, you can run your program as often as you would like before submitting it for grading. Below the code editor is an input box where you can type any test input values. Click `Run program` to execute your code and observe the program's output in the second box.
- **Submit Mode:** Once you have developed your code and tested it thoroughly, switch to submit mode to finalize your submission for grading.
**Example output:**
Will be displayed in the second box after running the program.
Use the following layout for user input and program output:
```plaintext
Enter your input:
[Your input values]
Program output:
[Your output results]
```
Make sure to test your program with different inputs to ensure it correctly calculates the driving costs before submitting it for grading.
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