Thread: Does anyone know where I can find some info on where to start on this program?

Assume the tanker is a cylinder of length 19.35 feet and volume 1320 gallons. What is the
diameter in feet of the tanker truck?
To solve this problem, write a Java program to calculate the diameter. For full credit, your
Java application must follow these specifications.
1. The program must interactively input the capacity of the tanker in gallons and its
length in feet. This should be done in the main method of your Tester class.
2. The input data should then be used to construct a TankerTruck object. You will
need to write the TankerTruck class.
3. A TankerTruck method should be used by main to calculate the resulting diameter of
the truck in feet.
4. Your program should use the standard Java constant for the math constant PI.
5. The output should be displayed using fixed-point notation, rounding to one decimal
place of precision

if anyone could help I would greatly appreciate it.

I am basically converting a c++ file to java: I am new to java. I am just trying to convert it.

C++ Code

#include <iostream>
#include <cmath>
#include <cstdlib>
#include <iomanip>
using namespace std;


int main()
{

double volume = 0;
double length = 0;
double radius = 0;
cout << " What is the max volume of water in tanker? : ";
cin >> volume;
cout << " What is the length of the tanker in feet? : ";
cin >> length;

radius = sqrt(volume/length/M_PI);
cout << setprecision(1) << fixed;
cout << " The diameter in feet is: " << radius*2 << endl;

system("pause");
return 0;

}

Well I have got this far in the translation: but the user inputs are wrong, and I want to break the program up into a class and a tester.

ex.:

public class TankerTruck
{
 
 
 
 
	public static int Main()
	{
 
	double volume = 0;
	double length = 0;
	double radius = 0;
	System.out.print(" What is the max volume of water in tanker? : ");
	cin >> volume;
	System.out.print(" What is the length of the tanker in feet? : ");
	cin >> length;
 
	radius = Math.sqrt(volume / length / Math.PI);
	System.out.printf("%.1f", " The diameter in feet is: ");
	System.out.printf("%.1f", radius * 2);
	System.out.printf("%.1f", "\n");
 
	system("pause");
	return 0;
 
	}
}

I am here, where to next?

ex.:

import java.util.*;
 
public class TankerTruck
{
 
	public static int Main()
	{
	    Scanner userInputScanner = new Scanner(System.in);
	System.out.print(" What is the max volume of water in tanker? : ");
	double volume = userInputScanner.nextDouble();
	System.out.print(" What is the length of the tanker in feet? : ");
	double length = userInputScanner.nextDouble();
 
	radius = Math.sqrt(volume / Length / Math.PI);
	System.out.printf("%.1f", " The diameter in feet is: ");
	System.out.printf("%.1f", radius * 2);
	System.out.printf("%.1f", "\n");
 
	system("pause");
	return 0;
 
	}
}

No "radius" is all wrong.

ex.:

import java.util.*;
import static java.lang.Math.PI;
import java.lang.*;
 
public class TankerTruck
{
 
    public static int Main()
    {
        Scanner userInputScanner = new Scanner(System.in);
    System.out.print(" What is the max volume of water in tanker? : ");
    double volume = userInputScanner.nextDouble();
    System.out.print(" What is the length of the tanker in feet? : ");
    double length = userInputScanner.nextDouble();
 
    double radius = PI / volume / length;
    System.out.printf("%.1f", radius * 2);
    System.out.printf("%.1f", " The diameter in feet is: ");
    System.out.printf("%.1f", "\n");
}
}

No because I don't know what I am doing. I write c++ not java.

ex.:

import java.util.*;
import static java.lang.Math.PI;
import java.lang.*;
 
public class TankerTruck
{
 
    public static int Main()
   {
        Scanner userInputScanner = new Scanner(System.in);
    System.out.print(" What is the max volume of water in tanker? : ");
    double volume = userInputScanner.nextDouble();
    System.out.print(" What is the length of the tanker in feet? : ");
    double length = userInputScanner.nextDouble();
 
    double radius = PI / volume / length;
    double diameter = radius * 2;
    System.out.printf("%.1f", " The diameter in feet is : %d%n", diameter);
 
   }

Its asking for a return statement??? It will not compile.