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Thread: Calling a function not working

  1. #1
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    Post Calling a function not working

    I have the following function cube_vol() to calculate the volume of a cube. It gives me an error as follows:
    Exception in thread "main" java.lang.Error: Unresolved compilation problem:
    The method cube_vol(double) in the type Test is not applicable for the arguments ()
    Could you please help me see what went wrong? Thank you.

    import java.util.Scanner;
     
    public class Test {
     
    	public static void main(String[] args) {
     
                    // calling the function
    		cube_vol();
    	}
    		// Cube function
    		public static double cube_vol(double sideCube) {
    			printMe("What is the length of one of the sides: ");
    			Scanner input = new Scanner(System.in);
    			double sideCube = input.nextDouble();
    			double ans1 = cube_vol(sideCube);
    			printMe("The cube's volume is: %.2f\n", ans1);
    			double cubeVol = Math.pow(sideCube, 3);
    			return cubeVol;
    		}
     
    		public static void printMe (String text) {
    			System.out.println(text);
    		}
     
    		public static void printMe (String text, double value) {
    			System.out.printf(text, value);
    		}
    	}

  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Calling a function not working

    method cube_vol(double) in the type Test is not applicable for the arguments ()
    The cube_vol method is declared to take a double as an argument. The statement with the error does not have any arguments.
    To fix - Add a double value as an argument to the method.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Calling a function not working

    The cube_vol method is asking the user for an input of a double value of the side of the cube.
    double sideCube = input.nextDouble();

    Do I add a double value like this?
    cube_vol(sideCube);

    And it is still not working giving me an error:
    Exception in thread "main" java.lang.Error: Unresolved compilation problem:
    sideCube cannot be resolved to a variable

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: Calling a function not working

    sideCube cannot be resolved to a variable
    Is sideCube declared and given a value before it is used?
    You need to post all the code to show where those two statements are located.
    If you don't understand my answer, don't ignore it, ask a question.

  5. #5
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    Default Re: Calling a function not working

    That's the whole piece of code I have. I post it again here.
    sideCube is declared as this:

    double sideCube = input.nextDouble();

    When the user enters a double value, it is the argument for the cube_vol method but this doesn't work.

    import java.util.Scanner;
     
    public class Test {
     
    	public static void main(String[] args) {
     
                    // calling the function
    		cube_vol(sideCube);
    	}
    		// Cube function
    		public static double cube_vol(double sideCube) {
    			printMe("What is the length of one of the sides: ");
    			Scanner input = new Scanner(System.in);
    			double sideCube = input.nextDouble();
    			double ans1 = cube_vol(sideCube);
    			printMe("The cube's volume is: %.2f\n", ans1);
    			double cubeVol = Math.pow(sideCube, 3);
    			return cubeVol;
    		}
     
    		public static void printMe (String text) {
    			System.out.println(text);
    		}
     
    		public static void printMe (String text, double value) {
    			System.out.printf(text, value);
    		}
    	}


    --- Update ---

    Got that working now

    package com.langara.week4;
     
    import java.util.Scanner;
     
    public class Test {
     
    	public static void main(String[] args) {
     
     
    		cube_vol();
    	}
    		// Cube function
    		public static double cube_vol() {
    			printMe("What is the length of one of the sides: ");
    			Scanner input = new Scanner(System.in);
    			double sideCube = input.nextDouble();
    			double cubeVol = Math.pow(sideCube, 3);
    			printMe("The cube's volume is: %.2f\n", cubeVol);
    			return cubeVol;
    		}
     
    		public static void printMe (String text) {
    			System.out.println(text);
    		}
     
    		public static void printMe (String text, double value) {
    			System.out.printf(text, value);
    		}
    	}

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