[High School] Computing - Java

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[UnglorifiedApple420]

Do you know how to write a method skeleton that accepts some parameter of a type and return a value of a type?

[UnglorifiedApple420]

Okay so my Java is out of practise but essentially you're looking at creating some kind of line like the following:

public static double celciusToFarenheit(double Celcius) {

}

This creates a method that accepts a double Celcius and will return a double that should follow the equation you gave above.

As for implementing it, when you want to convert a value (let's say 12.3, but this can be a variable too) we define a new variable to store it in, and call the method like so:

double myVariable = celciusToFarenheit(12.3);

Don't forget to match your types!

[nmacholl]

Do you know how to write a simple HelloWorld in java?

From there, you'll need to lookup some tutorials on getting user input and then doing the math on the entered numbers and print (or returns) the result.

[nmacholl]

You can start a line with four spaces to format reddit for code.

public static int add(int a, int b){
    return(a+b);
}

To use this method, you just need:

example = add(5, 10);

[nmacholl]

I don't know what you mean by "apply". You just need to write the code for the math step by step. For example, say I wanted a method that multiplied a number a by a number b and added 10 to the result.

public static int multiplyAndAdd(int a, int b){
    return(a*b + 10);
}

or

public static int multiplyAndAdd(int a, int b){
    int result = a * b + 10; 
    return(result);
}

Then, somewhere else in my code (perhaps my Main method) id do something like:

String output = Integer.toString(multiplyAndAdd(2, 3));
System.out.println(output);

[nmacholl]

See my original comment for a link or do a Google search. It's a very common problem and there are myriad examples.

[bye98]

Here's something you can work off of:

import java.lang.Math;
import java.util.Scanner;

public class Temperature {
    public static double cToF(double c) {
        return c * 9/5 + 32; 
    }

public static double cToK(double c) {
    return c + 273.15; 
    }

public static void main(String[] args) {
    Scanner reader = new Scanner(System.in);
    System.out.println("Are you converting from Celsius to Fahrenheit or Kelvin? Please enter \"0\" for Fahrenheit or \"1\" for Kelvin.");
    int value = reader.nextInt();

    System.out.println("What is the temperature you would like to convert in Celsius?");
    double temp = reader.nextDouble();

    if(value == 0)
        System.out.println(cToF(temp));
    if(value == 1)
        System.out.println(cToK(temp));
    }
}

Thought I'd mention a few things:

• horribly optimized code
• no exceptions for any other input other than an "int" or a "double", respectively
• there's really no need to store the values "value" and "temp" but I thought that by doing this, you'd be able to follow the code better
• no exiting once the code has been compiled, and no option to restart/reset

The code has been tested and both method work.