Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
Write a
program should allow the user to repeat this calculation as often as the user wishes. Define a function to compute the number of miles per gallon. Your program should use a globally defined constant for the number of gallons per liter. Note: A liter is 0.264179 gallons. An example run of the program is shown below:
Hints:
1. What will your function do? Document that in the comment.
2. What are the parameter(s) to the function? What type? What type is the returned value?
3. What kind of a loop should you use? What’s the minimum number of times the user will go through the
loop?
How to write a function
1) Determine the type and number of parameters
2) Determine the type of the return value
3) Declare the function (usually at the top of the program)
4) Write the function (usually at the bottom of the program)
![[mingli@polaris:~/TA]$ ./lab4_function
Please enter the number of liters and the number of miles:
10 50
Miles per gallon is : 18.9266
Continue (Y/N) ?
Y
Please enter the number of liters and the number of miles:
5.8 43
Miles per gallon is : 28.0635
Continue (Y/N) ?
Y
Please enter the number of liters and the number of miles:
3.2 36.7
Miles per gallon is : 43.4128
Continue (Y/N) ?
N
[mingli@polaris:~/TA]$ O](https://content.bartleby.com/qna-images/question/5bd3697d-7244-4dc8-845a-c06954fa71b0/f93faddb-f64b-4c0f-b97e-e385a5a9714c/85z8faj_processed.png)
Transcribed Image Text:[mingli@polaris:~/TA]$ ./lab4_function
Please enter the number of liters and the number of miles:
10 50
Miles per gallon is : 18.9266
Continue (Y/N) ?
Y
Please enter the number of liters and the number of miles:
5.8 43
Miles per gallon is : 28.0635
Continue (Y/N) ?
Y
Please enter the number of liters and the number of miles:
3.2 36.7
Miles per gallon is : 43.4128
Continue (Y/N) ?
N
[mingli@polaris:~/TA]$ O
Expert Solution
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Step 1
Modified Program:
#include <iostream>
using namespace std;
int main(void)
{
const double GALLONS_PER_LITER = 0.264179;
int liters = 0;
double distance = 0.0;
double mpg = 0.0;
do
{
cout << "Please input how many liters of gasoline is in your vehicle: ";
cin >> liters;
cout << "Please input the distance in miles you traveled in your vehicle: ";
cin >> distance;
mpg = distance / (liters * GALLONS_PER_LITER);
cout << "Your vehicle's MPG is: " << mpg << endl;
}while(liters >-1);
return 0;
}
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