Getting error in main class please resolve.

Question

1.00/5 (1 vote)

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C#

import java.util.Scanner;
import static java.lang.Math;
public class Root1
{
	int a;
	int b;
	int c;
	double root1;
	public Root1(int a, int b, int c)
	{
		this.a=a;
		this.b=b;
		this.c=c;
	}
	public double calculateRoot1()
	{
		int d=calculateDeterminant();
		this.root1=(-b+Math.sqrt(d))/2*a;
		return root1;
	}
	public int calculateDeterminant()
	{
		int d= b*b-(4*a*c);
		return d;
	}
}
public class Root2
{
	int a;
	int b;
	int c;
	double root2;
	public Root2(int a, int b, int c)
	{
		this.a=a;
		this.b=b;
		this.c=c;
	}
	public double calculateRoot2()
	{
		int d=calculateDeterminant();
		this.root2=(-b+Math.sqrt(d))/2*a;
		return root2;
	}
	public int calculateDeterminant()
	{
		int d= b*b-(4*a*c);
		return d;
	}
}
public class RootMain
{
	Scanner input=new Scanner(System.in);
	System.out.println("Enter value of a");
	int a=input.nextInt();
	System.out.println("Enter value of b");
	int b=input.nextInt();
	System.out.println("Enter value of c");
	int c=input.nextInt();	
	public static void main(String args[])
	{
		Root1 r1= new Root1(a,b,c);
		System.out.println(r1.calculateRoot1);
		Root2 r2=new Root2(a,b,c);
		System.out.println(r1.calculateRoot2);
	}
}

What I have tried:

i am creating a program of finding roots of quadratic equation but getting error in main class. please solve it. tomorrow i have to present this program in my class.

Posted 26-Sep-16 0:38am

Member 12759772

Updated 26-Sep-16 22:40pm

v2

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Comments

Patrice T 26-Sep-16 6:44am

And you have plan to tell us which error message and where ?

OriginalGriff 26-Sep-16 6:47am

What? And spoil the surprise? :OMG:

Patrice T 26-Sep-16 6:51am

lol

[no name] 26-Sep-16 8:23am

You should probably tell your teacher that they need to incorporate "how to use the debugger" into your class.

Member 12759772 27-Sep-16 1:33am

actually two classes and two constructor are must requirement to build this program. if any solution please help.

[no name] 27-Sep-16 8:18am

What does that have to do with you learning how to use the debugger?

[no name] 26-Sep-16 8:41am

Unless they have changed the rules, you can't have executable code outside of a method. You have a bunch of code outside your main method. But then reading the error message that your build environment showed you might be too much trouble.

2 solutions

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Richard MacCutchan · Answer 1 · 2016-09-26T02:52:00

Solution 1

You do not need the extra classes in there and you have code outside your main method, so this is never going to build, let alone run. See The Java™ Tutorials[^] for information on creating a java program.

Posted 26-Sep-16 2:52am

Richard MacCutchan

Comments

Member 12759772 27-Sep-16 1:33am

actually two classes and two constructor are must requirement to build this program. if any solution please help.

Richard MacCutchan 27-Sep-16 2:46am

No, that is not at all true. You only need a single class to make this program work. If your assignment insists that you create multiple classes then you need to learn about nested classes: see http://docs.oracle.com/javase/tutorial/java/javaOO/nested.html[^].

Member 12759772 27-Sep-16 4:40am

Yes you are right but i have solved all of this errors and posting the solution, and also a hearty thanks for all of your suggestion. Thank you every one.

Richard MacCutchan 27-Sep-16 8:44am

Have you actually tried to run it? Even after correcting the syntax errors it does not give an answer.

Member 12759772 · Answer 2 · 2016-09-26T22:40:00

C#

import java.util.Scanner;
import java.lang.Math;
class Root1
{
	int a;
	int b;
	int c;
	double root1;
	
	Root1(int x, int y, int z)
	{
		a=x;
		b=y;
		c=z;
	}
	public double calculateRoot1()
	{
		int d= b*b-(4*a*c);
		root1=(-b+Math.sqrt(d))/2*a;
		return root1;
	}
	
}
class Root2
{
	int a;
	int b;
	int c;
	double root2;
	Root2(int x, int y, int z)
	{
		a=x;
		b=y;
		c=z;
	}
	public double calculateRoot2()
	{
		int d= b*b-(4*a*c);
		root2=(-b-Math.sqrt(d))/2*a;
		return root2;
	}
	
}
public class RootMain
{
		
	public static void main(String args[])
	{
		Scanner input=new Scanner(System.in);
		System.out.println("Enter value of a");
		int a=input.nextInt();
		System.out.println("Enter value of b");
		int b=input.nextInt();
		System.out.println("Enter value of c");
		int c=input.nextInt();
			
		Root1 r1= new Root1(a,b,c);
		System.out.println("Value of Root 1 is:"r1.calculateRoot1());
		Root2 r2=new Root2(a,b,c);
		System.out.println("Value of Root 2 is:"r2.calculateRoot2());
	}
}