Error with line 20: Required 'Int' found Double

Question

I'm having a problem with line 20 and I'm hoping someone can point me in the right direction as to what I'm doing wrong. All I'm trying to do is display aa display of Celsius along with their respective Fahrenheit temperatures. Celsius increments from 0-100 and Fahrenheit from 32 - 212. This is otherwise far from finished and I'm aware it's still a mess. I've gotten the data to to display but it's in one column as opposed to the two it's supposed to be in.

I appreciate your thoughts and input on this.

/*
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 */
package celsiustofarenheittable;

/**
 *
 * @author these
 */
public class CelsiusToFarenheitTable {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) 
    {
        double celsiusToFarenheit,farenheit,celsius = 0;
        celsiusToFarenheit = celsiusToFarenheit(farenheit,celsius);     // HERE!
        System.out.printf("Celsius \t Farenheit \n", celsius,farenheit);

        {
            for (celsius = 0; celsius <= 100; celsius += 10)
            {
                if (celsius <= 100 )
                    System.out.println(celsius);
            }

                while (farenheit <= 100){ 
                        System.out.println(farenheit * 1.8 + 32);
                        farenheit = farenheit + 10;
            }
            }     
      }    
    public static double celsiusToFarenheit(int celsius)
    {
        double farenheit;
        farenheit = math.round(celsius * 1.8 + 32);
        return farenheit;
    }
}

Answer 1

You are really close, the actual conversion from Celsius to Fahrenheit is correct.

So your issue is that you are passing two doubles , farenheit and celsius to your method celsiusToFarenheit(int celsius) As you can see from the method declaration, it requires just int celsius . From this celsius value you are doing the conversion to Fahrenheit.

So for instance:

int celsius = 10;
double fahrenheit = celsiusToFarenheit(celsius);

This produces a fahrenheit of 50, which is as to be expected

Answer 2

The celsiusToFarenheit method is expecting one integer parameter and you are providing two double arguments in the line 20.

My suggestion is to make your celsius variable match the method argument type ( int ), and provide just the celsius variable in the line 20:

celsiusToFarenheit(celsius)

Answer 3

There is so many unnecessary variables and other stuffs that you don't really need. I have modified your code, made it as simple as possible, enjoy:

    public class CelsiusToFarenheitTable {

    public static void main(String[] args) 
    {
    double fahrenheit = 32.0, celsius = 0.0;
    System.out.printf("Celsius \t Farenheit \n", celsius,fahrenheit);


        for (celsius = 10; celsius <=100; celsius+=10)
        {
            System.out.print(celsius);
            System.out.print("\t");
            System.out.println(celsius * 1.8 + 32);
            fahrenheit = fahrenheit + 10;
        }
  }    

}